John Burke Krasinski (born October 20, 1979) is an American actor, screenwriter, producer, and director. He is the recipient of several accolades, including two Primetime Emmy Award nominations and two Screen Actors Guild Awards. Time named him one of the 100 most influential people in the world in 2018.

Educated in theatre arts at Brown University and the National Theater Institute, Krasinski played minor roles in movies and off-Broadway plays before he was cast in 2005 as Jim Halpert on the NBC sitcom The Office, a role for which he received critical acclaim. He also served as a producer and occasional director of the series throughout its nine season run.

His film credits include License to Wed (2007), Leatherheads (2008), Away We Go (2009), It's Complicated (2009), Something Borrowed (2011), Big Miracle (2012), Promised Land (2012), Aloha (2015), and 13 Hours: The Secret Soldiers of Benghazi (2016). Krasinski directed and starred in the drama Brief Interviews with Hideous Men (2009) and the comedy-drama film The Hollars (2016). In 2018, Krasinski directed, co-wrote, and starred in the critically acclaimed horror film A Quiet Place (2018). That year, he also produced and played the title character in the Amazon series Jack Ryan.

In addition to acting in television series and films, Krasinski has performed voice-over work in both animated and documentary films and has established a production company, Sunday Night Productions, in 2013. Krasinski is married to British actress Emily Blunt, and they have two daughters together.