Robert De Niro - Rocky and Bullwinkle
While DeNiro has been at the heart of some of the greatest films of all time, he's also made some spectacularly bad choices. Particularly in the past decade or so.
As such, picking the worst of his films would be an entertaining parlor game, if there wasn't such an obvious answer. Say what you will about Meet The Fockers, at least he wasn't donning a bad Russian accent, apeing his most iconic performance, and chasing after "Mouse and Squir-rel".