We didn't know we wanted a movie with Chris Pratt as Santa until right now, but boy do we want it.

'Passengers' star Chris Pratt was on Fallon last night to talk about his upcoming sci-fi/adventure/romance romp with Jennifer Lawrence when things took a very festive turn and the 'Tonight Show' host swayed Pratt into taking part in Christmas version of his 'Mad Libs Theater'.

Watching Chris Pratt regret his choices immediately is only half the fun, the real fun starts when he's trussed up in a Santa outfit and is forced to commit to the bit.

Even J.Law gets a mention.