Let's make this birthday one to remember.

45 years old (Born on October 20, 1979)

Actor; He is famous from Jim on The Office.

Graduated from Newton South High School (1997) Comes from a Polish family. Father is doctor, mother is nurse. He has two older brothers. Was the Best Man at his brother, Paul Krasinski's wedding to Ashley Russell Krasinski on June 22, 2002, at St. Vincent Ferrer church, followed by a reception at the Rainbow Room in New York City. Studied at the National Theater Institute

First stage experience was starring in a satirical high school play written and cast by B.J. Novak, now a writer and co-star on "The Office" (2005).

In License to Wed, the character of Ben's parents are played by John's real life parents.

At 6' 3", very tall by regular standards, he is the shortest among his siblings, with his brothers being 6' 6" and 6' 10", respectively.

Is friends with David Schwimmer, with whom he work in Duane Hopwood.

Graduated from Brown University in 2002 as an honors playwright (with a B.A. in English Literature).

Brother Kevin, the eldest, is a doctor, and brother Paul, the middle, is strategic consultant.

Used to be a script intern on "Late Night with Conan O'Brien" (1993).

Interned at Hill Holliday advertising agency, where he worked on Dunkin' Donuts commercials.

Graduated from Brown University in 2002 with a B.A. in English Literature.