What's the most amazing thing about watching Game Of Thrones? Reading everything about it after you've watched it! We know a lot about "Game of Thrones" casts: their likes and dislikes, their passions and fears, whether or not they're involved in an incestuous relationship, the number of dragons they possess, etc. The acts are so captivating that we often forget that there are real people hiding under Cersei Lannister and Daenerys Targaryen. These actresses and actors have often appeared in many other productions before their appearance on HBO's most popular series.

Take a look at this list and see if you can find your favorite Game of Thrones character before they arrived in Westeros.

1 Jason Momoa As Jason (In 2003's Baywatch) And As Khal Drogo (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Joseph Jason Namakaeha Momoa was born on August 1, 1979, in Honolulu, Hawaii. After high school, he landed a lead role, beating out of thousands of hopefuls in the TV series Baywatch (1989) (known as "Baywatch Hawaii" in its 10th season). When the show ended, he spent the next couple of years traveling around the world. In 2001, he moved to Los Angeles, where he continued to pursue an acting career.

In 2010, he appeared in the Emmy-nominated HBO series Game of Thrones, playing the Dothraki king, Khal Drogo. To illustrate to the producers that he was Khal Drogo, he performed the Haka, a traditional war dance of the Maori of New Zealand.

2 Diana Rigg As Emma Peel (In 1961's The Avengers) And As Olenna Tyrrel (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Diana Rigg was born on July 20, 1938, in Doncaster, Yorkshire, England.

She made her professional stage debut in 1957 in the Caucasian Chalk Circle and joined the Royal Shakespeare Company in 1959. She made her Broadway debut in the 1971 production of "Abelard & Heloise." Her film roles include Helena in A Midsummer Night's Dream (1968); Lady Holiday in The Great Muppet Caper (1981); and Arlene Marshall in Evil Under the Sun (1982). In 2013, she appeared with her daughter Rachael Stirling on the BBC series Doctor Who (2005) in an episode titled "The Crimson Horror" and plays Olenna Tyrell on the HBO series Game of Thrones (2011).

3 Young Kit Harington And As Jon Snow (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Not only has GoT made Harington part of the most talked-about cliffhanger in television history, but the show also brought him a significant other: Harington translated his on-screen romance with costar Rose Leslie off camera, walking red carpets with her and taking her on adorable dates.

4 Gwendoline Christie As Lexi (In 2012's Wizards Vs. Aliens) And As Brienne Of Tarth (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Gwendoline Christie was born in Worthing, West Sussex, England and trained in dance and gymnastics as a child. She graduated from Drama Centre London with a First Class BA (Hons) in 2005, and her first job was with Declan Donellan in 'Great Expectations' at the Royal Shakespeare Company that autumn. She then went on to work in regional theatre, world tours, and the West End.

Her striking appearance motivated photographer Polly Borland to collaborate with her as the subject of a noted series of photographs. In 2011 Gwendoline was cast in the role of Brienne of Tarth in the successful HBO TV adaptation Game of Thrones.

5 Iain Glenn As Carl Galton (In 1988's The Fear) And As Ser Jorah Mormont (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Iain Glen is a Scottish actor, who was born on June 24, 1961, in Edinburgh, Scotland. He was educated at the Edinburgh Academy, an independent school for boys (now co-educational), followed by the University of Aberdeen. He graduated from the Royal Academy of Dramatic Art, where he was the winner of the Bancroft Gold Medal.

He and his first wife, Susannah Harker (House of Cards (1990), Pride and Prejudice (1995), Ultraviolet (1998)) have a son, Finlay. They divorced in 2004. He met Charlotte Emmerson at the National Theatre (while he was performing Streetcar Named Desire with Glenn Close). They have two children Mary and Juliet. They finally married in the summer of 2017.

6 Peter Dinklage As Finbar Mcbride (In 2003's The Station Agent) And As Tyrion Lannister (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Dinklage has picked up an Emmy nomination for each GoT season so far for his role as ridiculed royal Tyrion Lannister, taking home the statue twice. His iconic GoT role also inspired an uncanny wax figure of the star and some hilariously quotable memes. Dinklage is currently awaiting the arrival of his second child with wife Erica Schmidt.

7 Young Kristofer Hivju And As Tormund Giantsbane (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

A second-generation Norwegian actor, Kristofer Hivju was born on 7 December, 1978 in Oslo. He is the son of actors Lieselotte Holmene and Erik Hivju, a prominent character actor who appeared with his son in the short film Flax, where Kristofer shared screenwriting credit with director Bård Ivar Engelsås.

Kristofer made his American Film debut in Matthijs van Heijningen Jr.'s 2011 prequel of John Carpenter's The Thing (2011). Next he was seen in M. Night Shyamalan's After Earth (2013) but he is most recognizable as fan favorite Tormund Giantsbane on HBO's Game of Thrones

8 Charles Dance As David Carlton (In 2002's Ali G Indahouse) And As Tywin Lannister (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Charles Dance is an English actor, screenwriter, and film director. Dance typically plays assertive bureaucrats or villains. Some of his most high-profile roles are Tywin Lannister in HBO's Game of Thrones (2011), Guy Perron in The Jewel in the Crown (1984), Sardo Numspa in The Golden Child (1986), Jonathan Clemens in Alien (1992), Benedict in Last Action Hero (1993), the Master Vampire in Dracula Untold (2014), Lord Havelock Vetinari in Terry Pratchett's Going Postal (2010) and Alastair Denniston in The Imitation Game (2014).

9 Lena Headey As Young Mary (In 1992's Waterland) And As Cersei Lannister (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Lena Headey is a British actress. She was born in Bermuda to parents from Yorkshire, England, where she was raised. She is the daughter John Headey, a police officer, and his wife, Sue.

Headey is best known for her role as "Cersei Lannister" in Game of Thrones and The Brothers Grimm (2005), Possession (2002), and The Remains of the Day (1993). Headey stars as "Queen Gorgo," a heroic Spartan woman in the period film, 300 (2006), by director Zack Snyder.

10 Emilia Clarke When She Was A Child And As Daenerys Targaryen

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Clarke joined the series as a relative newcomer to acting, but will certainly leave it with serious star power. As badass heir-to-the-Iron-Throne Daenerys Targaryen, the actress has supplied some of GoT‘s most jaw-droppingly empowering moments. The actress is the face of a new Dolce & Gabbana perfume, and she has a top-secret role in an upcoming Star Wars film.

Her career trajectory leaves little room for revisiting her GoT role after its end. “I have no doubt there’ll be prequels and sequels and who knows what else,” she recently told Rolling Stone. “But I am doing one more season. And then that’ll be it.”

11 Sean Bean As Horace Clark (In A 1984 Episode Of The Bill) And As Ned Stark (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Sean Bean's career since the eighties spans theater, radio, television, and movies. Bean was born in Handsworth, Sheffield, West Riding of Yorkshire, to Rita (Tuckwood) and Brian Bean. He worked for his father's welding firm before he decided to become an actor.

He attended RADA in London and appeared in a number of West End stage productions including RSC's "Fair Maid of the West" (Spencer), (1986) and "Romeo and Juliet" (1987) (Romeo) , as well as "Deathwatch" (Lederer) (1985) at the Young Vic and "Killing the Cat" (Danny) (1990) at the Theatre Upstairs.

12 Carice Van Houten As Suzy (In 1999's Suzy Q) And As Melisandre (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

One of Europe's most celebrated actresses, Carice van Houten is perhaps best known for her lead roles in Paul Verhoeven's award-winning Black Book, Bryan Singer's Valkyrie opposite Tom Cruise and as Melisandre on Game of Thrones.

Her Dutch-language feature Love Life gained her further critical acclaim and broke box office records in her native Holland. Her next film Happy Housewive won her a record-breaking 5th Golden Calf at The Netherlands Film Festival and was voted 'Best Dutch Actress of All Time' by the Dutch audience.

13 Maisie Williams When She Was A Child And As Arya Stark (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Thrones‘ first season premiered in 2011, two days after Williams turned 14. Aside from killing it (literally) as fan favorite Arya Stark — her first-ever role — Williams, 20, also found a close friendship with costar Sophie Turner. The two achieved best friend goals when they wore matching Halloween costumes last fall, and even got identical tattoos. Williams is optimistic for her life post-GoT. “It’s quite exciting that the show’s coming to an end,” she told TIME. “It’s a time to look quite positively at the future and really try to shape my career without being tied to anything.”

14 Sophie Turner When She Was A Child And As Sansa Stark (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Turner has cultivated a second family out of her GoT castmates since she started as a teenager. “I feel like I have the world’s biggest family,” she said. “The support system has been the greatest thing for me.” The X-Men star, who is currently dating musician Joe Jonas, 27, says growing up on the graphic HBO series was her “sex education.” “The first time I ever found out about oral sex was from reading the script,” she told the U.K.’s Sunday Times. “I was like … ‘Wow! People do that? That’s fascinating!’ “

15 Young Hafþór Júlíus Björnsson And As The Mountain (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Hafþór Júlíus Björnsson is an Icelandic professional strongman, actor, and former professional basketball player.

On 31 January 2015, Björnsson beat a 1000-year-old record set by Orm Storolfsson at the World's Strongest Viking competition in Norway, where he carried a 10 m (33 ft) long 650 kg (1,430 lb) log for five steps.

16 Aidan Gillen As Frank (In 2000's The Low Down) And As Petyr Baelish (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Aidan Gillen is an Irish actor. He is best known for portraying Petyr "Littlefinger" Baelish in the HBO series Game of Thrones (2011), CIA operative Bill Wilson in The Dark Knight Rises (2012), Stuart Alan Jones in the Channel 4 series Queer as Folk (1999), John Boy in the RTÉ Television series Love/Hate (2010), and Tommy Carcetti in the HBO series The Wire (2002).

In 2011, Gillen began playing Petyr "Littlefinger" Baelish on the HBO series Game of Thrones, for which he received his second Irish Film & Television Award nomination.

17 Rose Leslie As Gwen Dawson (in 2010's Downton Abbey) And As Ygritte (in Got)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Rose Leslie is a Scottish actress. Her leading on-screen debut was at age 21 in the television film New Town (2009). She is famous for playing Ygritte in the HBO fantasy series Game of Thrones. Leslie also appeared in the films Now Is Good (2012) and The Last Witch Hunter (2015).

18 Natalie Dormer As Victoria (In 2005's Casanova) And As Margaery Tyrell (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Natalie Dormer born 11 February 1982 is an English actress. She is best known for her roles as Anne Boleyn on the Showtime series The Tudors (2007-10), as Margaery Tyrell on the HBO series Game of Thrones (2012-14), Irene Adler on the CBS series Elementary (2013-15), and as Cressida in the science-fiction adventure films The Hunger Games: Mockingjay - Part 1 (2014) and Part 2 (2015). She has been nominated for Best Performance at the Gemini Awards for her work in The Tudors. She has also been nominated for a Screen Actor's Guild Award for her performance in Game of Thrones.

19 Tom Wlaschiha (In 2008's Spoons) And As Jaqen H'gar (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Tom Wlaschiha was born on June 20, 1973, in Dohna, German Democratic Republic. He is an actor, known for his role as Jaqen H'gar in HBO's Game of Thrones.

20 Ross Mullan As Puppeteer (In 2007's Bear Behaving Badly) And As White Walker (In GoT)

Game of Throne Cast Then & Now: See Their Amazing Transformation

Game of Throne Cast Then & Now: See Their Amazing Transformation

Ross Mullan, originally from Montreal, Canada, has been living in the UK now for 20+ years. He began his performing career working mostly in mask and physical theatre companies and then began writing his material and playing clubs and bars doing comedy. He then started working in theatre doing National and International tours of shows such as East of Eden, David Copperfield, Christmas Carol and Sherlock Holmes.

He is The WhiteWalker on HBO's Game of Thrones, The Silence and The Teller on Doctor Who and in _Clash of the Titans he plays Pemphredo one of the three blind Stygian witches.

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