Biography
David Hornsby (born December 1, 1975) is an American actor, screenwriter, and producer. He is best known for a 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 co-produces. Hornsby also had a regular role on the NBC comedy-crime series Good Girls (2018–2020). He is also the voice of Fanboy in the Nickelodeon animated TV series Fanboy & Chum Chum.
Known For
Complete Filmography

Merry Little Batman
2023
as The Joker / Fireman (voice)
This Christmas, Damian Wayne wants to be a superhero like his dad – the one and only Batman. When Damian is left home alone while Batman takes on Goth...

Fool's Paradise
2023
as Pilot
A down-on-his-luck publicist discovers a recently released mental health patient who looks just like a misbehaving movie star. The publicist subs him ...

The Layover
2017
Screenplay
When their plane is rerouted due to a hurricane warning, two single female best friends find themselves competing for the same guy during an extended ...

Earmouse and Bottle
2014
as Earmouse
Earmouse helps his friend Bottle stand up to the evil Wizard who created him.

A Very Sunny Christmas
2009
Co-Executive Producer
Dennis and Dee decide to teach Frank a lesson "A Christmas Carol"-style, and Mac and Charlie learn some shocking things about their childhood Christma...

Pretty Bird
2008
as Kenny
A comic tale of three would-be entrepreneurs who set out to invent a rocket belt. The clash of their mismatched personalities soon dissolves the busin...

Fanboy
2008
as Fanboy (voice)
Two kids in superhero costumes purchase their favorite drink and end up creating an ice monster.

Aliens vs Predator: Requiem
2007
as Drew
After a horrifying PredAlien crash-lands near a small Colorado town, killing everyone it encounters and producing countless Alien offspring, a lone Pr...

Flags of Our Fathers
2006
as Louis Lowery
There were five Marines and one Navy Corpsman photographed raising the U.S. flag on Mt. Suribachi by Joe Rosenthal on February 23, 1945. This is the s...

Christmas with the Kranks
2004
as Randy Becker
When their only daughter Blair leaves the family nest, Luther and Nora Krank decide to book an island cruise to beat the yuletide blues and just skip ...
Straight Eye: The Movie
2004
as Daryl

Minority Report
2002
as Pre-Crime Public Service Announcer
John Anderton is a top 'Precrime' cop in the late-21st century, when technology can predict crimes before they're committed. But Anderton becomes the ...
Born Loser
2001
as Warren
Office hijinks have an unexpected outcome in this unnerving story set in the claims department of a small insurance company. Life will never be the sa...

Pearl Harbor
2001
as Flyer with Murmur
The lifelong friendship between Rafe McCawley and Danny Walker is put to the ultimate test when the two ace fighter pilots become entangled in a love ...