That we don't know.
But, based on the Twitter pics he shared below, taken on the Sydney Harbour Bridge, the 59-year-old got down on one knee, and ...
David Hasselhoff and Hayley Roberts
... they kissed afterward! So that's something!
In the first Twitter picture, we see Hasselhoff on bended knee proposing to the Welsh stunner, 32, and in the second one, we see the couple kissing.
The cute couple has dated for nearly a year after meeting when Roberts asked for his autograph at Britain's Got Talent auditions in Cardiff, Wales.
If they are in fact getting hitched, this would be the Hoff’s third marriage.
He was previously married to actress Catherine Hickland from 1984-1989. The same year he divorced Hickland, Hasselhoff married actress Pamela Bach, with whom he has two daughters, Taylor and Hayley, but divorced in January 2006.
Congratulations, we're sort of guessing!