Leslie Mann and Paul Rudd
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Leslie Mann and Paul Rudd on Apatow film, This is 40

13 February 2013 Last updated at 03:26 GMT

Producer, writer and director Judd Apatow hired his entire immediate family for his latest film, This is 40.

Leslie Mann, who stars as 40-year old Debbie, says the film was inspired by some elements of her real-life marriage to the director.

Paul Rudd, who became part of the Apatow family for the project, told the BBC's Rachel Curtis about being in the director's familiar cast.