ASHTON KUTCHER - KUTCHER'S PUNK'D PRANK LEAVES VARTAN UNIMPRESSED

ASHTON KUTCHER has reportedly been forced to ditch one of his pranks on hit show PUNK'D, after victim MICHAEL VARTAN failed to see the funny side of it.

Most stars - including JUSTIN TIMBERLAKE, HALLE BERRY and SALMA HAYEK - have laughed when they've discovered their mini crises were fictional situations dreamed up by Kutcher.

But, according US WEEKLY, JENNIFER GARNER's ex-boyfriend Vartan was far from amused with the prank chosen for him.

A source says, "They get Michael on a jet, and he finds out the plane is in really bad shape. He wants off, but the pilot and flight attendants won't let him.

"Things are falling off the plane - it's really coming apart and they're telling him, 'No, it's fine, stay.'"

After the prank was revealed, the crew laughed, but a furious Vartan reportedly refused to sign a release for the segment to be broadcast.