The movie poster for this film is a take on a famous "Rolling Stone" magazine cover of Yoko Ono and John Lennon in which John was completely naked.
Dane Cook can be seen wearing a Super Club Baseball cap while playing Frisbee in the park. "Super Club" was the fictional wholesale store that Dane Cook worked for in one his previous movies, Employee of the Month (2006).
There were altogether 21 African Penguins (Spheniscus demersus). Five of them were trained and would let people touch them.
Jennifer Love Hewitt was offered the role of "Cam Wexler", but turned it down because of scheduling conflicts. The role then went to Jessica Alba.
In both of her "stripping" scenes Jessica Alba felt very uncomfortable filming in front of the cast.