Big Bang Theory actress Kaley Cuoco, 27, and tennis player Ryan Sweeting, 26, got engaged on Sept. 26 after three months of dating. 

"Flying high, I could literally touch the sky with you," she tweeted to her 1.6 million followers that day. On her Instagram account, she shared a snapshot with her mother Ashley and sister Briana, and captioned the image, "A sweet celebration w my sweet soul sisters."

The marriage will be the first for both Cuoco and Sweeting. The actress admitted her engagement to Sweeting "seems a little crazy" after only three months of dating, but that she is sure he is The One.

"From day one I just knew immediately and it's been magic," she told Entertainment Tonight on Sept. 30. "We have all the same family friends. We grew up with the same people, we just never met. So I kind of feel that I've known him my whole life. I know that it seems a little crazy on paper, but it's what works for us."

Sweeting proposed with a 2.5-carat dazzler from Red C Jewels that cost $65,000, according to E! News. It features a halo setting with an eternity diamond band. A wedding date has not been announced at time of publication.

Cuoco is currently filming The Wedding Ringer.

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Sweeting was born in Nassau, Bahamas, and became a professional tennis player in 2007, according to ATP World Tour. He started playing tennis when he was 6 and has lived and trained in Fort Lauderdale, Fla, since he was 12. He studied at the University of Florida and has served as practice partner on US Davis Cup teams in 2006 and 2007.

Before taking on the role of Penny in The Big Bang Theory, Cuoco was a model and commercial actress, according to her IMDb account. Her first major role was in the 1992 TV movie Quicksand: No Escape with Donald Sutherland and Tim Matheson. She has mainly stuck to acting on the small screen and was on 8 Simple Rules from 2002-2005, and then Loonatics Unleashed from 2005-2006. She also had roles in the series' Charmed, Monster Allergy and 6Teen.

Scroll through the gallery to see images of the happy couple.