2. Macaulay Culkin
Who doesn't know the smart kid from the Home Alone series? Well, things were different when the teenage photos of the Home Alone star, Macaulay Culkin, first hit the media. It was hard to recognize him as he was looking gaunt and haggard – all thanks to drug abuse. It was extremely painful for the fans to know the depths of the actor's addiction. The drug addiction not only changed the face of Macaulay Culkin but also contributed to the demise of his relationship with Mila Kunis.