'Big Bang Theory' actress Kaley Cuoco has found her knight in shining armor in tennis player Ryan Sweeting after only three-months of dating (following a possible PR romance with Henry Cavill). The duo are engaged to be married.

"It's only been three months but she knows Ryan is the one," a source confirmed to Us Weekly, which was doubly confirmed by Cuoco's rep. "When you know, you know."

"[She's] never felt this way. She knows this is it. And the ring is gorgeous!"

Sweeting proposed yesterday (Sept. 25) after appearing on the red carpet for the first time together at the Emmy Awards on Sunday.

Cuoco posted a cryptic tweet on Twitter following the proposal, gushing to the internet:

This will be the first marriage for both lovebirds. We wish them nothing but the best.

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