Bridesmaids co-stars Rebel Wilson and Matt Lucas have upset their neighbours after moving in together in Hollywood as they constantly sing songs from musicals.

The pair hit it off when they starred in the comedy last year, and decided to become roommates while they reside in Los Angeles for work.

However, their partying has riled nearby residents, who have posted the pair a letter warning they will call the cops if they don't stop singing.

Explaining the predicament to U.S. chat show host Conan O'Brien, Wilson said, "We played roommates so well in Bridesmaids, we thought we'd do it for real. But instead of annoying Kristen Wiig, we're annoying all the neighbours nearby. We got a letter in the mailbox... and so it's a little bit disturbing because it's anonymous for a start... (We sing a lot of show tunes). We've been mixing it up a bit, we do Oklahoma, Little Shop of Horrors, Fiddler on the Roof. The neighbours do not enjoy it."

She then read the note out to the audience in a creepy voice.

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