Madeleine's double has been taken on by the Juliet Adams Model Agency, alongside doppelgangers of stars like Elvis, Harry Potter and Little Britain's Vicky Pollard.
According to newspaper reports, agency boss Shona Adams thinks three-year-old Kelsy Lynn Kudla could make millions if she plays Madeleine in a Hollywood movie.
Ms Adams, 41, has reportedly defended the move, saying "it's entertainment".
On her website she advertises child models from the age of '0 to 12' and tells parents: "Here's your chance to get your child into the modelling and talent industry - and maybe even launch a whole new career for you and your child".