Kaley Cuoco Engaged to Ryan Sweeting

Sept. 26, 2013 -- "The Big Bang Theory" star Kaley Cuoco is engaged to her boyfriend, tennis player Ryan Sweeting, her rep confirmed to ABC News. Us Weekly magazine broke the news.

The couple have only been dating for a few months, but, a source told the magazine that the actress, 27, is smitten. "When you know, you know," the source said. "[She has] never felt this way. She knows this is it. And the ring is gorgeous!"

Kaley Cuoco Talks 'Big Bang Theory'

Cuoco and Sweeting, 26, attended the Emmys together on Sunday and a few days later, the actress was spotted wearing a diamond ring on the set of her new movie, "The Wedding Ringer." "Flying high, I could literally touch the sky with you...." she tweeted Wednesday night.

This will be the first marriage for both. Earlier this year, Cuoco was linked to "Man of Steel" star Henry Cavill briefly.