Ashton vows never to let Demi get Punk'd

Ashton Kutcher has vowed to his wife and Hollywood actress Demi Moore that he will never allow her to get Punk'd.

Kutcher is famous for setting up celebrities with elaborate Jeremy Beadle-style pranks for his show on MTV.

Among those stars that have been subject to his set-ups are the likes of Eva Longoria, Justin Timberlake and Simon Cowell, but Moore will never be a victim.

Actress Jill Wagner, who used to help Kutcher to set up pranks for the show, reportedly told The Sun: "There's no way Demi will ever get Punk'd. No way. They made a pact that he'd never do it.

"And because they live together there's lots of things she could do to make his life hell if he ever did!"