Kaley Cuoco is engaged to another man, but ex-boyfriend and co-star Johnny Galecki has finally opened up about their two-year romance while on "The Big Bang Theory."

"We're dear friends, still. Kaley's not just an ex, she's a part of my life," says Galecki according to Us Weekly.

"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. I get the curiosity, but I don't want to distract from the story."

As fans know, Johnny Galecki and Kaley Cuoco currently star on the CBS monster hit sitcom "The Big Bang Theory," and their on-screen personas also have an on-again, off-again relationship.

But now, Kaley Cuoco is moving on from Johnny Galecki with fiancé Ryan Sweeting.

During a recent episode of "The Ellen Degeneres Show," Kalay Cuoco talks about her very fast romance and engagement to professional tennis player Ryan Sweeting.

"I am very, very happy. So happy. Life is so good right now. I cannot even tell you," says Cuoco to Ellen.

During the interview, Kaley Cuoco talks about being "very sad" prior to meeting Ryan Sweeting. "I was just not in a good place to meet anyone. I was not ready. I said, 'I'm taking time away from love for a while," continues Cuoco.

Cuoco was convinced by a mutual friend to meet Sweeting, "And so I said OK, I'm going to meet him, I'll meet him. So we go and have a dinner date and we're still on our first date. He never went home."