Dan Harmon was born in Milwaukee in 1973. After performing stand-up and sketch comedy, he went to Los Angeles where he began writing screenplays with friend Rob Schrab. Robert Zemeckis at Imagemovers asked them to write the family animated film Monster House, followed by Ben Stiller's pilot Heat Vision and Jack. It wasn't picked up, and Dan began attending classes as Glendale Community College. During this time, Dan and Rob launched Channel 101, the untelevised non-profit audience-controlled network for undiscovered filmmakers. Sarah Silverman aproached Dan and Rob to create her a series for Comedy Central, which evolved into The Sarah Silverman Program. Dan then created Acceptable TV, a televised version of Channel 101. Upon its cancellation, Dan pitched Community to Sony who picked it up. He served as head writer, showrunner and executive producer on the show for three consecutive years.
On May 10, 2012, NBC announced Community would be back for a fourth season but it was uncertain if Harmon would return as his contract with Sony was up. On May 18th, 2012 Sony Pictures Television made the official announcement that Dan Harmon would not return as showrunner and instead be made a consulting producer. He was replaced by the team of David Guarascio and Moses Port whose work included the ABC sitcom "Happy Endings". Under the new showrunners Season Four concluded it's run on May 9 and on May 10 Community was renewed for another season. Moses Port and David Guarascio declined to return for the next season and Sony began negotiations with Harmon to return to the show. On June 1, 2013, Harmon officially announced on his twitter account that he would be returning for Season Five. On November 15, 2014, Harmon married his longtime girlfriend Erin McGathy .