Leslie J. Mann is an American actress best known for her roles in comedic films such as The Cable Guy, George of the Jungle, The 40-Year-Old Virgin, Knocked Up, 17 Again, Funny People, Rio, The Change-Up, and This Is 40, many of which are collaborations with her husband, Judd Apatow. In 2012, Elle named her "Hollywood's queen of comedy".

She played the role of Katie, the woman that Cameron tries to pick up pretending to be straight, in "Treehouse".

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