Leslie Mann was in “Knocked Up” and “The 40-Year-Old Virgin,” but now she’ll play a cougar. In the new look-book from fashion label Band of Outsiders, shot on a yacht, she’s cast as a potential paramour to James Franco‘s younger brother Dave Franco and “Community” star Donald Glover. “I thought it would be kind of hilarious to pair a cougar with two younger dudes and see what kind of story would come out of it,” designer Scott Sternberg tells Page Six.