David Hornsby

David Alan Hornsby (born December 1, 1975) is an American actor. He is best known for his recurring role as defrocked priest Matthew "Rickety Cricket" Mara on the FX comedy series It's Always Sunny in Philadelphia, for which he also writes and produces. Hornsby had a regular role on the NBC comedy-crime series Good Girls (2018–2020). He was also the voice of the titular character Fanboy in the Nickelodeon animated TV series Fanboy & Chum Chum. Hornsby earned a Tony nomination for co-writing the musical adaptation of The Lost Boys, which opened on Broadway in April 2026.