Patrick Galen Dempsey is an American actor and race car driver, best known for his role as neurosurgeon Dr. Derek Shepherd on Grey's Anatomy. He saw early success as an actor, starring in a number of films in his early 20s, including Can't Buy Me Love and Loverboy. In the 1990s, he mostly appeared in smaller roles in film, such as Outbreak, and television, before landing a lead role in Sweet Home Alabama, a surprise box office hit. He has since then starred in a number of other films, including Enchanted, Made of Honor, Valentine's Day, Flypaper, Freedom Writers and Transformers: Dark of the Moon.\nDempsey, who maintains a sports car and vintage car collection, also enjoys auto racing in his spare time. He has competed in prestigious pro-am events such as the 24 Hours of Le Mans, Rolex 24 at Daytona sports car race, and Tecate SCORE Baja 1000 off-road race. Prior to the 2013 24 Hours of Le Mans, Dempsey declared that he would \"walk away\" from acting if he could and dedicate himself full-time to motorsports.