Just days after his solo appearance at the Primetime Emmy Awards, reports are confirming that Big Bang Theory star Johnny Galecki  and his girlfriend, Kelli Garner, have split.

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Galecki and the Pan Am actress first went public with their romance in March 2012, and attended several events together, including last year's Emmy awards, as well as Galecki's co-star and ex-girlfriend Kaley Cuoco's wedding to tennis pro Ryan Sweeting last New Year's Eve.

Neither has officially commented on the split, though a source told E! News that nothing nasty prompted the two to call it quits, and that the break-up was actually quite amicable.

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"It's all good," the source said. "They still hang out a lot."

Garner wouldn't be the first ex Galecki remained friends with, as he and Cuoco have stayed the best of friends following their own two-year romance (which was a secret at the time) ending more than three years ago, something Galecki finally addressed in CBS Watch! Magazine last November.

"We're dear friends, still. Kaley's not just an ex, she's a part of my life," Galecki said at the time. "I just don't like to speak about it. And not because I'm trying to be enigmatic; I just worry that it will conflict with people's acceptance of Leonard and Penny [their characters on their show]. I get the curiosity, but I don't want to distract from the story."

Cuoco had previously opened up about their romance in 2010, admitting that they did keep the romance a secret to help protect the show, but the secret-keeping did eventually take a toll on their romance.

"We knew we weren't destined to be together, We accepted it and said, 'Look, if we ever break up, we will be professional," she said at the time. "I'm so lucky it was a mutual ending and that we don't hate each other. We've seen that happen on other shows."

Despite being single once again, things aren't all bad for the 38-year-old actor. He, Cuoco and Jim Parsons successfully renegotiated their contracts to each make a whopping $1 million per episode when The Big Bang Theory returns to CBS this fall.