Roberts admitted that she didn't even think Hasselhoff wanted to get married, saying that they hadn't really discussed the possibility.
"I genuinely had no idea he was going to propose," Roberts told Hello!. "I thought he was just joking around at first. He's asked me before, but it was never for real. Then he pulled out the ring. I cried so hard that he didn't get around to actually asking, 'Will you marry me?' until about 10 minutes later."
HELLO ! Thanks for all Congratulations to me & Hayley&GUMBALL &2nd season premiere of Hoff The Record on Dave this Friday ! BEST WEEK EVER!
The happy couple reportedly first met when Hasselhoff was signing autographs in a hotel lobby during his stint as a Britain's Got Talent judge.
This will mark Hasselhoff's third marriage. He previously wed soap star Catherine Hickland in 1984. After the estranged couple split in 1989, Hasselhoff married actress Pamela Bach the same year, but they later called it quits in 2006. Hasselhoff and Bach have two daughters together -- Taylor, 25, and Hayley, 23.
"I told my girls what I was going to do, and they were both really supportive," Hasselhoff said. "It's tough. No one wants to see their parents split up. But they love Hayley and they're just happy for me."