Steve Granitz/WireImage
September 26, 2013 at 08:06 PM EDT

Kaley Cuoco, of The Big Bang Theory, is engaged to tennis player Ryan Sweeting, People reports.

Cuoco, 27, and Sweeting, 26, attended the 65th Primetime Emmy Awards together on Sunday. Cuoco shared a photo on her Instagram from the awards ceremony, with the caption “#emmys w my main man @ryansweething .. Thank you @verawanggang !!!!!”

“He is an amazing guy,” a source told People. “She is so happy.”

Cuoco appears as Penny on The Big Bang Theory. She previously dated Man of Steel star Henry Cavill.

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