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Troian Bellisario as Spencer Hastings and Alex Drake in Pretty Little Liars
Troian Bellisario played Spencer Hastings for seven years before she was handed a second role in the show's series finale: Alex Drake, Spencer's evil twin.
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Lindsay Lohan as Hallie Parker and Annie James in The Parent Trap
Lindsay Lohan made her big-screen debut in 1998 in a dual role. The breakout star, who was just 11 years old when she filmed her scenes, played twin sisters Hallie Parker and Annie James in a successful remake of The Parent Trap.
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Armie Hammer as Cameron and Tyler Winklevoss in The Social Network
Armie Hammer landed one of his first major film roles as real-life twins Cameron and Tyler Winklevoss. The actor played the brothers in 2010's The Social Network.
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Hayley Mills as Sharon McKendrick and Susan Evers in The Parent Trap
Preceding Lohan in the role of The Parent Trap twins, Hayley Mills played Sharon McKendrick and Susan Evers in the original 1961 film.
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Tom Hardy as Reggie and Ronnie Kray in Legend
Tom Hardy took on two roles in 2015's Legend. The Mad Max actor played real-life gangster twins Reggie and Ronnie Kray.
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Nicolas Cage as Charlie and Donald Kaufman in Adaptation
Nicolas Cage joined 2002's Adaptation as Charlie and Donald Kaufman, playing the twins in the Oscar-winning flick.
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Leonardo DiCaprio as King Louis XIV and Philippe in The Man in the Iron Mask
Early in his career, Leonardo DiCaprio brought two characters to 1998's The Man in the Iron Mask. The future Oscar winner played twins King Louis XIV and Philippe.
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Jean Claude Van Damme as Alex and Chad Wagner in Double Impact
Jean Claude Van Damme was double the fun in 1991's Double Impact. The action star appeared as twins Alex and Chad Wagner.
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Marion Cotillard as Marie and Lucie in Pretty Things
Marion Cotillard played twins Marie and Lucie in the 2001 French film Pretty Things.
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Bette Midler as Sadie Shelton and Sadie Ratliff in Big Business
There was a double dose of twins in 1988's Big Business. Bette Midler took on the first set of identical sisters, playing Sadie Shelton and Sadie Ratliff.
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Lily Tomlin as Rose Ratliff and Rose Shelton in Big Business
Lily Tomlin brought the second set of identical twins to Big Business, appearing as sisters Rose Ratliff and Rose Shelton.
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Bette Davis as Margaret DeLorca and Edith Phillips in Dead Ringer
Bette Davis was a dead ringer for herself in 1964's Dead Ringer. The famed actress played twins Margaret DeLorca and Edith Phillips in the thriller.
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Paul Dano as Paul and Eli Sunday in There Will Be Blood
There Will Be Blood found its twins in Paul Dano. The actor played brothers Paul and Eli Sunday in the 2007 movie.
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Edward Norton as Bill and Brady Kincaid in Leaves of Grass
Appearing alongside Keri Russell, Richard Dreyfuss, and Susan Sarandon, Edward Norton played identical twins Bill and Brady Kincaid in 2010's Leaves of Grass.