Australian actor Keir O’Donnell was born on November 8, 1978 in Sydney, New South Wales. His father was of Irish descent, and his mother was English. At the age of eight, he joined his family in moving to Harvard, Massachusetts. While there, he attended The Bromfield School and got involved in its prestigious drama department. He appeared on numerous theatre productions within the community. Because of his dedication and talent, he was awarded a Massachusetts High School Drama Guild Acting Scholarship in 1996.
Upon his graduation, Keir O’Donnell joined the first class of the newly created four-year classical theatre acting conservatory at The Hartt School in Connecticut. While there, he appeared in plays like Three Sisters, Lysistrata, and even portrayed Romeo in their production of Romeo and Juliet. When he finished his education, he was immediately accepted into the celebrated Hartford Stage Co. Regional Theatre and appeared in Macbeth and A Christmas Carol. Afterwards, he moved to Los Angeles to pursue a film career.
In 2001, the actor was cast as the lead in the U.S. premiere of Moritz Rinke’s The Man Who Never Yet Saw Woman’s Nakedness at The Odyssey Theatre. He then ventured out into student and independent films, later landing the role of Todd Cleary in the comedy Wedding Crashers. The film achieved mainstream success, allowing O’Donnell to join actor Vince Vaughn in his Wild West Comedy Tour.
Keir O’Donnell’s other credits include the 2002 movie Splat!, Noise, 2009’s Patriotville, and the indie comedy Flakes, which starred Aaron Stanford and Zooey Deschanel. He was also in The Break Up, teaming up with Vince Vaughn once more. He then starred in Paul Blart: Mall Cop with Kevin James, as well as the romantic comedy When in Rome.
As for his work on television, the actor has appeared on Lost, TNT’s The Closer, CSI and on FX’s Sons of Anarchy and It’s Always Sunny in Philadelphia. In 2010, he received the role of Kenneth Finley in the ABC documentary-style dramedy My Generation.