The star of TV's The Bing Bang Theory said that her handsome beau's proposal "actually started a little fight with me and threw me off.”
"I was like 'Oh my God, things aren't great’,” she told Entertainment Tonight. "He surprised me at the end of the night... [when] he popped the ring out. It was amazing."
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The couple have only been dating for three months, but Kaley says she feels like she’s known Ryan, 26, her whole life. The two grew up around the same people and have the same family friends, though the lovebirds hadn’t actually met until recently.
"From day one I just knew immediately and it's been magic," she gushed. "I know that it seems a little crazy on paper, but it's what works for us."
Ryan popped the question on Sept. 26 by presenting Kaley with a $65,000 diamond engagement ring -- just days after the happy couple made their red carpet debut at the Emmy Awards.
Kaley, 27, had a brief fling with Man of Steel actor Henry Cavill in July. She also previously dated Big Bang co-star Johnny Galecki for two years.