John Mainieri is an actor.
Cars 2
2011 · as J. Curby Gremlin (voice)
Trainwreck
2015 · as Mob Bar Bartender (uncredited)
Meet Dave
2008 · as Middle-Aged Man
The Normal Heart
2014 · as John
Wonder Wheel
2017 · as John
When in Rome
2010 · as Man in Elevator
Cayman Went
2009 · as Hans Kopechne
