Mary Steenburgen has joined the cast of Orange Is The New Black.

The Oscar-winning actress will join Taylor Schilling for season three of the original Netflix comedy about a group of inmates at a women's prison.

Steenburgen confirmed the news on her Twitter page, writing: "Very excited to go to my first wardrobe fitting of Oitnb! Will I be in orange or black?"

Details of Steenburgen's character have yet to be revealed.

Production for the 13-episode third season is already underway. 

The second season of the popular show was released on the streaming service on June 6.

Steenburgen recently starred on the small screen in Justified, Wilfred and 30 Rock.