Aussie actor Keir O'Donnell first took to performing not long after his family moved from a suburb outside Sydney, Australia, to Harvard, Massachusetts. There he attended The Bromfield School, a high school heralded for its exemplary drama department. O'Donnell immersed himself in acting, appearing in a number of plays at Bromfield, within community theater and on the festival circuit. This proved to be the start of a blossoming theatrical career. O'Donnell left the East Coast in 2001 for Los Angeles, hoping to pursue work in television and film. This gambit paid off in 2002 with a leading role in the paintball-centered action picture "In Your Face." But O'Donnell's big break did not come until 2005, when he scored a supporting role in the R-rated romantic comedy "Wedding Crashers," portraying a strange young man with a desperate obsession for his sister's new beau, played by Vince Vaughn. The movie was a massive success and sparked an on-going collaboration between O'Donnell and Vaughn, who included the young actor on his stand-up comedy special "Wild West Comedy Show: 30 Days & 30 Nights - Hollywood to the Heartland" and also gave him a small role in his romantic-comedy with Jennifer Aniston "The Break-Up." O'Donnell continues to delight with memorable and bizarre comedic turns, like his portrayal of duplicitous trainee Veck Simms in the Kevin James' comedy "Paul Blart: Mall Cop," and as a love-struck priest in the Kristen Bell romantic comedy "When in Rome."