David Alan Hornsby 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).
Photos 1
Filmography 13
Minority Report
Pearl Harbor
Aliens vs Predator: Requiem
Flags of Our Fathers
Christmas with the Kranks
The Layover
Merry Little Batman
Fool's Paradise
Pretty Bird
Fanboy
Earmouse and Bottle53 credits on file
Television 24
Bones
ER
The West Wing
New Girl
It's Always Sunny in Philadelphia
The Goldbergs
Six Feet Under
We Bare Bears
The Unit
Good Girls
Mythic Quest
Fanboy and Chum Chum
Baskets
Dirt
St. Denis Medical
Hello Ladies
Random! Cartoons
Side Quest
Unsupervised
The Joe Schmo Show
Battle Kitty
How to Be a Gentleman
Center of the Universe
Jake in ProgressIn their orbit 1
Connected to David 6
About this person
David Alan Hornsby 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.
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