John Burke Krasinski (born October 20, 1979) is an American actor, perhaps most widely known for playing Jim Halpert on NBC's The Office.

John Krasinski is a tall and handsome American film and TV actor who is best known for his role as sardonic nice guy Jim Halpert on NBC's popular TV series "Office, The" (2005) for which he won a 2007 Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Comedy Series. He was born John Burke Krasinski on October 20, 1979, in Newton, Massachussetts, USA, into a family of Polish-American heritage. He is the youngest of three brothers. His father, Ronald Krasinski, is a Medical Doctor, and his mother is a nurse. Young Krasinski was a voracious reader and was also fond of acting. His first stage experience was starring in a satirical high school play written and cast by B.J. Novak. He also was a good sportsman, he played on the same Little League Baseball team as B.J. Novak, now a writer and co-star on "Office, The" (2005). After graduating from Newton South High school in 1997, he attended Brown University, graduating in 2002, as a playwright with honors, then studied for one semester at the Eugene O'Neill National Theatre Institute in Waterford, Connecticut. He began his TV career in 2002, as a script intern on the Late Night show with Conan O'Brien. Krasinski made his big screen debut in 2002, then played several small roles, such as Ben in Kinsey (2004), and Bob Flynn in Duane Hopwood (2005). He appeared as Corporal Harrigan in Jarhead (2005) by director Sam Mendes, then played a supporting role as Ben in Holiday, The (2006), a romantic comedy by director Nancy Meyers. He is billed as the voice of Lancelot in Shrek the Third (2007). In his latest work on the big screen, Krasinski is co-starring opposite Robin Williams (I) and Mandy Moore (II) in romantic comedy License to Wed (2007). He is also director and writer of Brief Interviews with Hideous Men (2007), a big screen adaptation of the eponymous collection of short stories by David Foster Wallace. John Krasinski was featured in People Magazine's Sexiest Men alive issue of 2006. He is currently sharing time between his residence in New York City, and Los Angeles, where "Office, The" (2005) is filmed.