Karl Geary is an American actor whose career started in the 1990s. He first debuted in the film Nadja. The rest of the decade saw him appearing in the movies Gold in the Streets, Montana, Trance, and The Book of Stars. At the same time, he appeared in 2 episodes of the miniseries Painted Lady, acted in the TV movie Esther, and appeared in an episode of Sex and the City.
In 2001, he portrayed musician Steve Clark in the television film Hysteria – The Def Leppard Story. He also portrayed Horatio in the film Hamlet. He went on to have performances in such films as Happy Here and Now, Mimic 3: Sentinel, Stag Night, and The Burrowers. Geary also made his writing debut in the 2003 film Coney Island Baby. His most recent work on TV was as Diego in the Starz series Gravity. In the 2010s, he had roles in the films Archaeology of a Woman, Jimmy’s Hall, Experimenter, and I Am Not a Serial Killer.