Michael Rozman / Warner Bros. / Promotional 1 / 3
Michael Rozman / Warner Bros. / Promotional 1 / 3

If fans thought Kaley Cuoco got engaged to tennis player beau Ryan Sweeting quickly, just wait until they see her impromptu wedding ceremony on "The Ellen DeGeneres Show!" The "Big Bang Theory" star, 27, appeared on the popular talk show on Nov. 7 to talk about her engagement and Ellen, 55, quickly suggested she get married on the show, using one of her writers who had been ordained.

PHOTOS: Quickest celebrity engagements ever

"I even wore a white dress!" Cuoco declared after DeGeneres pulled out a veil and costume jewelry for the bride.

Cuoco's fiancé, 26, seemed a bit hesitant as DeGeneres ushered them quickly to the altar, saying, "This isn't legal, right?"

PHOTOS: 'Big Bang Theory' stars before they were famous

The comedian offered up her own wedding rings for the bride and groom and the ordained writer sped through the vows before declaring them man and wife. The couple sealed the momentous occasion with a kiss.

It's unlikely that they were actually married on the show, but Cuoco said she knew that Sweeting was the one early on.

PHOTOS: Kaley and Ryan's Emmy Awards PDA

"By Day 2, it was so unbelievable, I said, 'This is it,'" she told DeGeneres. "I know it looks a little crazy to some people."


Kaley Cuoco in a real wedding dress

Quickie celeb engagements

Here's what Kaley Cuoco looks like when she's falling in love