Bill Clinton in film cameo on The Hangover 2

MEL Gibson was persona non grata on The Hangover 2 set but that's not so with a former US President.

MEL Gibson was persona non grata on "The Hangover 2" set but that's not the case with former US President Bill Clinton.

Bubba was spotted on the set in Thailand with extra security added for his presence, website TMZ reports.

Pictures: Relive The Hangover

Pictures: Bad Mel Gibson

"Our spies say they saw Bill walk on the set and were told by crew members he was filming a cameo. None of the people we spoke too, however, saw Bill actually step in front of the camera," TMZ reported.

But it was "confirmed he did indeed shoot a cameo".

Our mind boggles with what Clinton's cameo entails. Tell us your plot, but keep it printable.