"I'm sort of distracted, not just by the snake, but there's a very large diamond ring on your finger," chat show host Kelly Ripa pointed out.
"I'm not sure if you want to announce anything… does that signify anything, is that a promise of something?"
Hayden, 24, initially remained coy, telling Kelly and her co-host Michael Strahan the ring "might" mean something. "I mean, I think it speaks for itself," she said.
But asked point-blank if she was engaged to her longterm boyfriend, boxer Wladimir Klitschko, the star finally relented.
"I am!" she said.
Hayden first met 37-year-old Wladimir in 2009 at a book party and the pair dated for two years before calling off their relationship. Happily, they reunited this past spring.
"It's like the 2.0 version," Hayden told Glamour of giving the romance a second chance.
"I've always had great relationships and stayed really good friends with the guys I've dated. It blows my mind sometimes that us getting together has gotten so much attention. It's like, 'Really? This is breaking news?'"
Hayden has confirmed that the couple haven't set a date for their big day or made any immediate plans, due to her busy filming schedule.