Biography

Is the son of actor/writer Mike Houlihan and actress Mary Carney. He has a fraternal twin brother named William who is also an actor/producer. He and his father Mike wrote the film Tapioca after the successful run of a sketch comedy show by the same name. Tapioca has screened at the Dallas Black Film Festival, The First Take Film Festival in Augusta, Georgia and premiered at the Park City Film Music Festival in Utah during Sundance. Paddy studied screen-writing at Columbia College in Chicago after transferring from Marquette University in 2000. He graduated from Columbia in 2004 and is an intern and student at The Second City in Chicago.
- IMDb mini biography by: slap happy

Attended Marquette University before leaving to study film at Columbia College Chicago.

Has trained at Chicago's Second City and Improv Olympic.

Attended Mt. Carmel High School on Chicago's South Side.

His twin brother Billy is a producer and partner on most of his projects.