ASHTON Kutcher showed a lot of front - by appearing on an American chat show in the NUDE.

The comic actor startled host Ellen DeGeneres by peeling off ALL his clothes for a skit.

The stark image is being used to promote the latest series of her hugely popular programme.

While the bearded actor`s privates are pixelated there is very little doubt he bared all.

Ashton`s stunt came about after he appeared nude on an ad for his new TV show Two And A Half Men, which was taped this week.

The star #151; married to actress Demi Moore - has taken over the lead role in the hit sitcom after Charlie Sheen was sacked.

When she encountered Ashton on her New York set, Ellen asked: "Maybe you want to put clothes on?"

He replied: "Oh, no. Have you seen the ad for the show (Two And A Half Men)?

"It`s getting a lot of attention, so I just figured I`m going to do everything nude from now on."

In the ad for his new series, Ashton and co-stars Jon Cryer and Angus T. Jones appear naked behind a billboard they are holding, which reads: "All will be revealed... 09.19.11".

Ashton`s debut on the show airs on September 19.