Steve Buscemi was actually a New York City Firefighter before he became an actor. His brother is an actor, Michael Buscemi, who plays a firefighter-- "Higgy" in the credits, "Higgins" on his uniform. In turn, an actual firefighter named Mark Higgins (and childhood friend of Sandler's) appears in the movie, but is credited only as "Fireman", along with several other actual firefighters.
While filming the hearing scene, when Dan Aykroyd made his way to the middle of the room to shout 'Enough,' 'Adam Sandler' and 'Kevin James' cheered him on, thus starting a standing ovation from the extras. According to the director, Aykroyd missed the rehearsal for the scene, so the extras were unaware of what he was going to do. The segment was caught on film and can be found in the extras on the DVD.
It represents Adam Sandler and Universal's fourth collaboration and their first movie together in eleven years. It is also Sandler's first major film not released by Columbia Pictures since Little Nicky (2000), which was released by New Line Cinema.
The fire companies portrayed in the movie are Engine 506/Ladder 223. In reality, FDNY engines numbered in the 500's are used as spares or are fully equipped on reserve status. Ladder 223 is also another fictional fire company. For the film, the firehouse used was FDNY's Engine 280/Ladder132 - built in 1912 and located in Prospect Heights, Brooklyn. The patches and motto used in the movie are the same patches and motto for the real fire companies assigned to the firehouse.
Producer Tom Shadyac had planned this film as early as 1999. I Now Pronounce You Joe and Benny, as the film was then titled, was announced as starring Nicolas Cage and Will Smith with Shadyac directing.
In November 2007, the producers of the Australian film Strange Bedfellows initiated legal action against Universal Studios for copyright violation. The suit was withdrawn in April 2008 after the producers of Strange Bedfellows received an early draft of Chuck & Larry that predated their film, and they were satisfied that they had not been plagiarized.