Gerard Butler has battled an addiction to painkillers since sustaining a 2007 injury on set. But now, Life & Style has learned that the actor has fully conquered his demons thanks to new girlfriend, Morgan Brown.

“He’s telling everyone that Morgan saved his life by getting him off painkillers,” an insider reveals in the new issue of Life & Style. “He says Morgan also put him on a regimen of green juices and since then, he’s lost weight and he’s feeling healthier.”

Morgan has made such an impact on the 'Ugly Truth' star, in fact, that he’s already telling friends she’s the one, even though they've only been dating since May. “They just moved in together,” the insider explains. “And now they’re talking marriage!”

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Gerard Butler has moved in with his interior designer girlfriend Morgan Brown after they started dating earlier this year.

Gerard Butler has moved in with Morgan Brown.

The 45-year-old actor, who started dating the interior designer earlier this year, is reportedly completely smitten with the brunette beauty and is planning to propose after just three months of dating.

A source said: ''Gerard is a one-woman man now. They just moved in together. And now they're talking marriage.''

The '300' star - who sought treatment in rehab in 2012 after becoming addicted to painkillers after sustaining an injury while shooting the movie 'Shattered' in 2007 - has adopted a much healthier approach in recent months in a bid to keep up with former model Morgan, 38.

The insider added to Life & Style magazine: ''He says Morgan also put him on a regime of green juices, and since then, he's lost weight and he's feeling healthier.''

The couple went public with their romance last month, but were first spotted kissing on a beach in California in September.

Earlier this year, Gerard complained that he was struggling to find the right woman.

During an interview in March, he said: ''I have not met the one princess yet.

''That doesn't mean I have not met a lot of princesses along the way, but not the one and only yet.

''Or maybe I have and she might come back into my life at some point. You should never rule out anything. But am I seeing the one now? The answer, sadly, is no.''