See The 'Game Of Thrones' Actors Before They Were Stars

Dinklage made is big-screen debut in 1995's "Living In Oblivion", playing an actor named Tito.

Years before he became Joffrey Baratheon, Jack Gleeson played an unnamed little boy in 2005's Batman Begins.

Lena Headey booked her first on-screen role as a teenager, playing Mary in 1992's "Waterland."

The Mother of Dragons got her start playing a small role in 2010's Triassic Attack on Syfy.

In the mid-2000s, a then-unknown actor by the name of Kit Harington joined a production of War Horse in London

At just 12 years old, Isaac Hempstead Wright made his big-screen debut in 2011's The Awakening.

Decades before Ser Jorah Mormont, Iain Glen starred in a British thriller called "Paris By Night" (1988).

In his mid-20s, a pre-Jaime Lannister made his film debut in the Danish thriller "Nightwatch" (1994).

Before John rose to fame as Samwell Tarly, he appeared in a handful episodes of the European drama Borgia.

In 1998, Alfie Allen played a small part in the Oscar-winning film, Elizabeth.

The Irish actor held the supporting role in 1995's Circle Of Friends, which also starred Minnie Driver.

One of her first roles was the so-called "Classy Shopper 2" in 2009's The Imaginarium Of Doctor Parnassus.