A promotional poster includes the personal phone number of Jonah Hill. It is listed as (917) 409-7838. Hill has set an automatic message or will speak to the caller either in character or as himself.
The character Garv, played by Broadway actor Sean Patrick Doyle, is based on an eccentric roller-skater Jonah Hill met in Venice Beach. The role was added to later drafts of the script.
When Blithe Pedulla (Landry Bender) is seen in her room at the start of the film, the TV is playing Alyssa Milano's 1988 Teen Steam workout video.
Wings Fish Market is also the location of the final scene involving all the bike messengers in the movie, Premium Rush (2012).
Gossip Girl (2007)'s Dreama Walker filmed several scenes as Stephanie, party girl and friend of Marisa (Ari Graynor), but her footage ended up on the cutting room floor.