Ben Stiller did his best ‘Joaquin Phoenix on Letterman’ impression at the Oscars last night.

With Natalie Portman as his straight woman and decked out in a big bushy beard and sunglasses, he explained he “just wants to retire from being the funny guy”.

It’s funny and his impersonation is spot on - and seems to be more proof that Joaquin is engaged in a performance piece, because the Oscars wouldn’t mock someone’s breakdown, would they? would they?