Portia Ann Doubleday is an American actress. She is best known for her roles as Sheeni Saunders in the film Youth in Revolt (2009), Chris Hargensen in the film Carrie (2013), and as Angela Moss in the USA Network television drama Mr. Robot (2015–2019).
Born and raised in Los Angeles, Doubleday is the younger of two daughters of Christina Hart and Frank Doubleday. She grew up in a show business family: her parents are former professional actors, and her older sister, Kaitlin is also an actress. Her mother now works in the entertainment industry as a writer and producer of plays.
Doubleday attended the Los Angeles Center for Enriched Studies, a magnet school in west Los Angeles. She played soccer for twelve years and described herself as a tomboy to the Los Angeles Times.
Doubleday first appeared in a commercial for Goldfish crackers at age eight and had a small role in the film Legend of the Mummy (1998). Her parents insisted that she finish high school before pursuing a career in acting.