Danny Mastrangelo is a writer, actor, improviser, and designer living in Los Angeles. In 2008 he began studying improv at The Upright Citizens Brigade Theatre in Los Angeles. Since then he has written for Sketch Cram at UCBTLA,  the sketch team Little Kevin Buttersmith, and been a performer for Those Aren't Muskets. In 2009 his first Harold team, Payphone Wedding, won the iO West Student Cagematch title. His sketch "Probably..." won third place at iO West's viral video night, and has been requested by the Nihilist Film Festival.

Around Los Angeles, Danny can also be seen performing improv with his teams Fat/Magic Bear and Not It!