In the film, Gerard Butler's character appears as a guest on The Late Late Show with Craig Ferguson (2005). Butler and Craig Ferguson are good friends in real life, and the former has been a guest on the real show several times.
Gerard Butler, in an effort to thoroughly understand the "man's man" in American society, went behind the scenes of Adam Carolla's namesake podcast to observe him.
The film was shipped to theaters under the code name "Helpful Advice."
Kevin Connolly's character Jim is supposed to be 5 feet and 8 and a half inches. In real life, Connelly is actually 5 feet 5 inches tall.
Was featured on episode 344 of the comedy podcast How Did This Get Made live from Scotland