Brittny Gastineau (born November 11, 1982) is an American model, socialite, and reality television personality.

After graduating from high school she attended the University of Alabama before returning to New York City to model.

She walked runways for Anne Bowen and Anna Sui during NYC fashion week in 2005, and signed an endorsement deal with L'Oréal Paris, which led to a European advertising campaign.

Her modeling career included contracts with MAC cosmetics, as well as occasional runway shows for boutiques such as Heatherette run by Traver Rains and Richie Rich.

In 2008 at Fashion Week in NYC, she walked the runway for designer Tamara Pogosian, and was featured in a campaign for Ferrari California in Beverly Hills.

In 2005, the series, eventually dubbed The Gastineau Girls, premiered on February 15 and became a modest hit for The E!

The first season chronicled mother and daughter's quest for love in New York City as well as Brittny's formal, successful introduction into the world of modeling.

In 2009, Gastineau appeared in a small segment of the movie Brüno where she is asked to judge whether Jamie Lynn Spears should keep or "abort" her unborn baby.