Neil Patrick Harris In Harold & Kumar Go To White Castle (2004), Harold & Kumar Escape From Guantanamo Bay (2008), and A Very Harold & Kumar 3D Christmas (2011)
When he first appeared in White Castle, as a former child star turned womanizing, pill-popping, car-stealing sleaze, it was clear the movies were destined to become cult classics. Though Harris in real life had previously only been perceived as "that adorable kid" from Doogie Howser, M.D., Harris in Harold & Kumar is the biggest prick ever, and proud of it. In the third flick, he reveals that his public persona as a happily coupled gay man is really just a front so he can continue to be a debauched hetero d-bag.
Verdict: Real-life NPH doing coke off of a female stripper's ass hasn't been plausible since 2006, when he came out of the closet. The man is a genius actor.