The 37-year-old Brazilian model said in a 73 Questions interview with Vogue that the NFL star filled her apartment with candles and rose petals before popping the question.
"When he proposed to me, he made up this whole story about how my apartment was flooding and I ran over there to try to fix the situation," Bundchen recounted. "When I got there, the whole apartment had candles and rose petals everywhere."
"He went down on his knees to propose and I'm like, 'Get up!' because he just had surgery and had three staph infections," she said. "I'm like, 'What are you doing?' He's like, 'I gotta go on my knees.' I'm like, 'No, no, no, get up, please!' And here we are."
Bundchen married Brady in Santa Monica, Calif., in February 2009, and has since welcomed son Benjamin and daughter Vivian with the New England Patriots quarterback. She shared her best marriage advice in the interview.
"Keep an open and loving communication," the star advised.
Bundchen and Brady celebrated Dia dos Namorados, or Brazilian Valentine's Day, this week. Brady posted a photo of himself wearing an "I love Gisele" shirt on the holiday Tuesday.
"Yes I do! Feliz dia dos namorados! Te amo muito!" he captioned the picture.