The Big Bang Theory's representative has confirmed the couple has split.

Suggesting her client has already ditched her married name, she tells, "Kaley Cuoco and Ryan Sweeting have mutually decided to end their marriage. They ask for privacy at this time. No further statement will be issued regarding this matter."

Sweeting proposed to the actress in September, 2013, after a whirlwind romance and they wed three months later on New Year's Eve (31Dec13).

The couple battled marriage trouble rumours in the spring (15) and Cuoco-Sweeting took to social media to deny reports she and her husband were experiencing problems.

Cuoco-Sweeting showed no signs of marital stress when she appeared on U.S. chat show Watch What Happens Live last week (ends18Sep15) and even opened up about her husband's relationship with ex-boyfriend Johnny Galecki, who plays her love interest on The Big Bang Theory.

She said, "We dated, like, five years ago so I think we've both moved on... Johnny is actually one of my best friends. It's a situation that ended well... Ryan loves him, Johnny loves (Ryan), it's been a long time, so it's great. I got lucky."