Osborne went on to write for other animated series appearing on the Cartoon Network , including '' Camp Lazlo '' ( Emmy nomination in 2006 ) , '' The Marvelous Misadventures of Flapjack '' ( Emmy nomination in 2010 ) , and '' Adventure Time '' ( Emmy nominations in 2010 , 2012 , 2013 , 2014 , and 2016 , with wins in 2015 and 2017 ) . He also wrote and storyboarded several episodes of the first season of Disney Channel 's '' Phineas and Ferb '' in 2008 . Osborne has been a screenwriter and actor in a number of films associated with the mumblecore movement , including several directed by Joe Swanberg . He co-wrote and acted in '' Hannah Takes the Stairs '' ( 2007 ) and had a supporting role in '' Nights and Weekends '' ( 2008 ) . For '' Uncle Kent '' , which debuted at the 2011 Sundance Film Festival , Osborne served as co-writer and co-producer , as well as playing the title role , loosely based on his own life . He returned to the semi-autobiographical role for the sequel '' Uncle Kent 2 '' , which premiered at the 2015 SXSW Film Festival
2011 Sundance Film Festival
2011 Sundance Film Festival
Kent Osborne