Krasinski was born in the Brighton section of Boston, Massachusetts, the son of nurse Mary Clare (née Doyle) and internist Dr. Ronald Krasinski. He has two older brothers, Kevin and Paul, and was raised Catholic in the suburb of Newton, Massachusetts. He played on the same Little League Baseball team and attended the same high school as B.J. Novak, later his co-star (Ryan Howard) on The Office Read more...

Krasinski's first stage experience was starring in a satirical play written and cast by B. J. Novak for Newton South High School. He decided to continue acting after doing a reading of David Foster Wallace's Brief Interviews with Hideous Men. Besides training at the National Theatre Institute, he also studied at The Royal Shakespeare Company in Stratford-upon-Avon and The Actor's Center in New York Read more...

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