There’s an early scene in 2007’s Walk Hard: The Dewey Cox Story, where 42-year-old John C. Reilly says, “I reckon it’s time for Dewey Cox to move on.” “But y-you’re only 14,” says Dewey’s mom. When thirty-four-year-old Kristen Wiig, as Edith, asks if she can join him Dewey says, “Of course you can, Edith. You’re my girlfriend.” “Did you hear that?” says Edith. “I’m Dewey’s 12 year-old girlfriend!”

As Homer Simpson says, “It’s funny ’cause it’s true.” Movie-makers love to cast actors old enough to have teen children in absurdly youthful roles. Here are ten examples:
Leslie Caron
26 years old as Gigi (15) in 1958’s Gigi
 “Thank heaven for little girls,” sings 70-year-old Maurice Chevalier in his role as Honoré. Creepy. Gigi’s pretty songs and costumes disguise the unsavory fact that the still-a-kid character is being trained to be a courtesan, which Merriam-Webster defines as “a prostitute with a courtly, wealthy or upper-class clientele.” Audrey Hepburn, 22, played Gigi in the 1951 Broadway play.