Cathy Moriarty showed Robert De Niro moral support by joining him in junk food binges on the set of Raging Bull - but quit when she piled on the pounds.
De Niro famously put on five stone (70 pounds) to play fallen boxer Jake LaMotta in the 1980 movie, and Moriarty - who played his wife, Vikki - gorged on her favourite cheesecake and milkshakes to support her co-star's efforts.
But the actress, who was just 18 when she was cast in the role, eventually had to leave De Niro to binge on his own - because the fatty diet was ruining her figure.
She tells BlackBookMag.com, "I played (Vikki) from ages 15 to 35, so it was kind of hard. But it was a hell of a lot harder for Bob to gain all of that weight. As he transitioned, he started drinking milkshakes and eating cheesecake, which I loved having also. Then I realised my a** was getting fat and I told him he had to gain the weight by himself!"