Kaley Cuoco is getting more practice before her big wedding day to fiance Ryan Sweeting.

At first the "Big Bang Theory" star was talking to Ellen DeGeneres about her brief romance and engagement to Sweeting, who was watching Cuoco backstage. Next thing she knew, DeGeneres surprised the couple with a veil, some flowers and an ordained minister and said, "We have this ready. Should you choose-we can do it."

"It will save you so much money," DeGeneres continued. "You can dance afterward," the talk show host said, adding that The Wanted, her other guests on the show, could play for them.

Putting on the veil, Cuoco declared, "I'm ready."

"Is this legal?" Sweeting asked before going along with the impromptu ceremony.

See Kaley Cuoco in a Wedding Dress

DeGeneres then gave away the bride and loaned the couple her rings while her head writer, who had recently become ordained, pronounced the couple married.

Earlier, Cuoco gushed to DeGeneres about happy she is with Sweeting, who proposed in September after their whirlwind summer romance. "So happy. Life is so good right now. I cannot even tell you," she said.

But the 27-year-old actress explained that initially she was "not ready" for love when a mutual friend kept pushing her to meet Sweeting over the summer.

"I was putting it off and really nervous about it and just not wanting to do this," Cuoco told DeGeneres.

Kaley Cuoco Engaged to Ryan Sweeting

Finally she agreed. "So we go and have a dinner date and we're still on our first date. He never went home," Cuoco said giggling.

She explained that Sweeting, who was from Florida, had just finished a tour and was checking in with his doctor in Los Angeles following back surgery, when he went out to dinner with Cuoco.

"I kind of nursed him back to health," she said with a smile. "You know by day two I was like, 'Oh my god.' It was so unbelievable. I said, 'This is it, this is it.'"

Last month, the actress fooled her fans by posting a picture of her in a wedding dress.

Turns out, she was actually in costume for her new movie, "The Wedding Ringer."

Michael Rozman/Warner Bros.