'The Biggest Loser' second season winner Matt Hoover and runner-up Suzy Preston

'The Biggest Loser' second season winner Matt Hoover and runner-up Suzy Preston

"The Biggest Loser" winner Matt Hoover may have lost 157 pounds -- the weight of a slim man -- but he's gained it back in the form of his fiancee.

The reality show contestant who walked away with the $250,000 grand prize proposed to, and was accepted by, his girlfriend and "Biggest Loser" competitor Suzy Preston while appearing on "The Today Show" Tuesday (March 28) morning.

Hoover sprang the surprise proposal live by telling the morning show audience, "Suzy has no idea our relationship is about to get a little closer."

"I have gone through a lot of changes in the last year," he then told her. "You've seen me at my worst and you've seen me change into a man that you love. Suzy, I want to keep changing and I want you to be by my side."

Cue the ring.

"I've had this made for you and if you'd like to have that, I'd like to give it to you and ask you to be my wife," he concluded. After a brief hesitation, she said, "Yes."

Hoover and Preston, both 29, met on the second season of NBC's popular reality show that push overweight people to lose weight and gain self esteem. Behind the scenes, their secret romance blossomed during the eighth week of the show. After the finale, in which Preston was the second runner-up, they had their first date and have been inseparable since, even making an appearance together on NBC's campy soap opera "Passions."

Hoover cites their shared experience as the key to their chemistry. Past reality shows have spawned other couples, with "Survivor" having a decent success rate considering the unsavory conditions. Sparks flew when Rob Mariano started admiring Amber Brkich's "slammin' body and smokin' ass" during "Survivor: All Stars" and proposed just before she won the $1 million during the show's finale. Their romance continued through a stint on "The Amazing Race" and a televised wedding special.

Other "Survivor" hookups that have yet to turn into matrimony (that we know of) include: "Survivor: Africa" winner Ethan Zohn dating "Survivor: The Amazon" winner Jenna Morasca after they appeared "All Stars" and host Jeff Probst dating "Survivor: Vanuatu" castaway Julie Berry.

Oddly enough, the ultimate dating show, "The Bachelor" and its spin-off "The Bachelorette," have a spotty track record for lovebirds. In the eleven seasons combined, only three couples remain together: "Bachelorette" Trista Rehn and Ryan Sutter, who tied the knot on national TV; Bachelor No. 6 Byron Velvick and Mary Delgado; and Bachelor No. 7 Charlie O'Connell and Sarah Brice.