Brady's father, Tom Brady Sr., told The Boston Globe on Friday that reports of his son's engagement were "rumor, rumor, rumor ... We don't know a thing about it. Nobody told me. We talked to him and there's nothing to say."
The Boston Herald reported that the couple strolled down Bean Town's Beacon Street on Friday - and that Bündchen, 28, was without an engagement ring.
Bündchen's twin sister, Patricia, also denied the report, saying in an e-mail that the engagement story - which first surfaced on TMZ - is "not true."
HuffPost Entertainment is your one-stop shop for celebrity news, hilarious late-night bits, industry and awards coverage and more — sent right to your inbox six days a week. Learn more