She graduated from El Camino Real High School in Woodland Hills, another district of Los Angeles; and then she began modeling with the representation of Elite Modeling Agency at the age of 19.

She also made a brief appearance in the 1990 film Rocky V. At present, she is a co-owner of Serious Skin Care, a company which sells beauty treatments and cosmetics via the home shopping network, ShopHQ.

[2] In 1988, Flavin met Sylvester Stallone in California at a Beverly Hills restaurant.

They were in a relationship until 1994, when Stallone wrote her a letter saying that he was having an affair with model Janice Dickinson, and that he was the father of her infant daughter.

On August 19, 2022, Flavin filed for a divorce from Stallone in the state of Florida.