Wrestler-actor John Cena recalled that his agency felt his merman Ken cameo in ‘Barbie’ was “beneath” him and advised him not to do it. “But...to the agency’s credit, immediately they acquiesced,” John said. “I read [Barbie’s] script...and tried my hardest to be in it. Margot Robbie [said], ‘We’ll make you...mermaid. You’ll be in it for half a day’,” he added.