Radha Rani Amber Indigo Ananda Mitchell (born 12 November 1973, Melbourne) is an Australian actress, best known for her roles in the films Pitch Black and Silent Hill. Radha was born in Melbourne and was the only child of parents who divorced early. She was raised in the spirit of Hindu culture and religion. Her father is a director and her mother is a designer. She graduated from St Michael's Grammar School in Australia. Her first name "Radha" is of Sanskrit origin. In Hinduism, this was the name of the beloved of the god Krishna. Radha is a vegetarian and practices yoga.

Mitchell began her career on Australian television in a children's television series. In 1994, in the series Neighbours, she played two roles with completely different personalities. She appeared in this show for 3 years.

In 1997, for her participation in two films — High Art and All Together — she was awarded the Independent Spirit film award. Among her other films are Pitch Black with Vin Diesel, Phone Booth with Colin Farrell, and Man on Fire with Denzel Washington.

Radha Mitchell also appeared in the film Finding Neverland, whose lead roles were played by Johnny Depp and Kate Winslet. All the stars of this film received the Screen Actors Guild Award in the outstanding performances category. In Maxim magazine's "Hot 100 in 2002" ranking, she took 45th place.