Steve-O has reportedly ended his romance with Elisabetta Canalis because of her love of partying.
The 37-year-old 'Jackass' star - who has been sober since entering rehab for drug abuse and bipolar disorder in 2008 - has apparently called time on the relationship because of their conflicting lifestyles.
A source told RadarOnline.com: "Steve-O dumped Elisabetta over her partying. He is extremely serious about his sobriety and did not want to be dating anyone who could jeopardise that.
"He still really cares about her but can't risk relapsing back into his old ways, so he had to cut her loose.
"Steve-O wants her to control the partying for her own sake. But, in the meantime he needs to distance himself from her."
The unlikely pair were first spotted together in January, after Elisabetta is said to have fallen for Steve-O's sense of humour - a trait he shares with her ex-boyfriend George Clooney.
An insider said at the time: "Steve makes Elisabetta laugh, and that's her weakness. That was her favourite thing about George Clooney- he was always cracking her up and playing practical jokes on her.
"Believe it or not, George has a little Jack Ass in him, and ever since Steve-O got sober, he's very sensitive and introspective, so Elisabetta is getting the best of both worlds.