She is perhaps best known for her recurring appearance on US TV show Lost, appearing in the Season 1 episodes of "Outlaws", as the girlfriend of Sawyer, and in the episode "Numbers", as the woman who read the lottery numbers. Her acting credits also include the role of Dara in the romantic-comedy Saving Face, as well as appearing in the upcoming movie Your Name Here, currently in post-production.
Brittany is also the wife of actor Harold Perrineau Jr. (one of the stars of Lost). The couple has a daughter, Aurora Robinson Perrineau, born 1995. It was confirmed in People Magazine that Brittany and Harold are expecting their second daughter, due in May of 2008. On May 7th 2008, Brittany gave birth their second daughter, Wynter Aria.