The 36-year-old `Arthur` star - who filed for divorce from Katy Perry in December after just 14-months of matrimony - is apparently so scarred by the experience that he has vowed never to wed again.
A source said: "Russ was devastated when things with Katy went wrong. We all worried he`d go off the rails again. He managed to pull himself together and he`s fine now.
"He`s had a chance to look back and assess everything and thinks marriage isn`t for him. Russ was never too keen on it in the first place but loved Katy and thought it`d work."
Since the split, Russell has been linked with Katy look-a-like Zooey Deschanel, and more recently 25-year-old Oriela Medellin Amieiro, who he is believed to have met at a yoga class. But while the comedian may be open to romance with Oriela, that is as far as it goes.
Talking to the Daily Star, the source added: "He doesn`t want to string her along, but he`s dead set on not getting married again."
Meanwhile, Katy, 27, fuelled speculation that she too has moved on when she was spotted with a mystery man at Los Angeles` LAX Airport on Tuesday (28.02.12). However, the tall, dark stranger has since been indentified as her gay stylist Johnny Wujek.