There have been numerous theories as to what ot who was to blame when it came to the dissolution of Kaley Cuoco and Ryan Sweeting's marriage. But a new report says the Big Bang Theory star's martial bliss may have been destroyed by drugs.

Was Ryan Sweeting Cheating On Kaley Cuoco?

According a recent article by The Daily Mail, Cuoco split from her husband because he was addicted to painkillers that were prescribed after a 2014 back surgery.

"She supported him but she said he couldn't make the commitment to get sober," sources said. "He's tell her he was working on it and instead go get wasted."

New Details About Kaley Cuoco & Ryan Sweeting's Split Revealed

The former tennis pro was allegedly sober when they married in December 2013, though he had a history of trouble with pills, which resurfaced after he suffered a back injury just months after the wedding, and suffered another injury earlier this year.

"Kaley told friends doctors prescribed something that he was taking too much of," the source said. "That is when it went downhill again."

Sweeting had reportedly promised his wife he would go to rehab in Boston, but it had become too late at that point to salvage the relationship.

"She couldn't fix him. He wasn't the man she thought he was," it was said.

The couple announced their split after 21 months of marriage Sept. 25, with divorce documents Cuoco filed earlier this week listing their separation date as Sept. 3. She cited irreconcilable differences in the documents, and revealed a prenuptial agreement had been signed in Nov. 2013 and that the divorce would be settled according to those terms.

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Kaley Cuoco, Ryan sweeting