Bonita Melody Lysette "Bonnie" Langford (born 22 July 1964) is an English actress, dancer and singer. She came to prominence as a child star in the 1970s, when she had a notable role in the TV series Just William. In the 1980s, she played companion Mel Bush in Doctor Who. She has also been known for appearing in various musicals in the West End and on Broadway, including shows such as Peter Pan, Cats, The Pirates of Penzance and Chicago. From 2015 to 2018, she portrayed the role of Carmel Kazemi on the BBC soap opera EastEnders, for which she received the 2016 British Soap Award for Best Newcomer.
Bonnie Langford attended the Arts Educational School, St Catherine's School, Twickenham and the Italia Conti Academy stage school. She first came to public attention when, aged six years old, she won the talent show Opportunity Knocks. This led to the role of Scarlett O'Hara's daughter in the London production of Scarlett (1972), and work in the 1974 Broadway revival of Gypsy starring Angela Lansbury, in the 1976 film Bugsy Malone, the 1977 film Wombling Free, and to still greater fame playing Violet Elizabeth Bott in the 1977-78 television series Just William. During this time, she was appearing as a regular on a children's prime-time show made by Yorkshire Television called Junior Showtime, along with child stars Lena Zavaroni, Neil Reid, Perry Cree, and Glynn Poole among others.
Between 1986 and 1987, Langford played the role of Mel, companion to both the Sixth and Seventh Doctors in the classic science fiction series Doctor Who. She returned to the role in 1993 for Dimensions in Time, a special charity Doctor Who/EastEnders crossover episode as part of the BBC's Children in Need. She has continued to reprise the role in several audio dramas alongside the Colin Baker and Sylvester McCoy Doctors and in a cameo in the episode "The Power of the Doctor".