Just a couple of days ago it was announced that "The Big Theory" star Kaley Cuoco and her boyfriend Ryan Sweeting are engaged. But apparently the hot actress had no clue what her beau was up to on the night of the engagement and admitted that he completely threw her off.

After three months of dating the tennis player proposed to his actress girlfriend, which took her by surprised seeing as he wasn't the nicest person to be around that evening.

The Maxim model told Entertainment Tonight, "He actually started a little fight with me and threw me off." The 27-year-old actress added, "I was like 'Oh my God, things aren't great.'"

However, the night ended on a positive note seeing as the 26-year-old athlete offered Cuoco a diamond ring. The actress explained, "He surprised me at the end of the night ... [when] he popped the ring out. It was amazing."

Cuoco and Sweeting have been dating since late summer following her split from "Man of Steel" star Henry Cavill.

The actress explained, "From day one I just knew immediately and it's been magic. 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."

The starlet admitted, "I know that it seems a little crazy on paper," she added, "But it's what works for us."

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