Bonnie Langford, who is currently appearing in BBC Eastenders, attended the Arts Educational School and the Italia Conti Academy stage school. Her first stage appearance was at four months, and her first public appearance was at 15 months when she danced in specially-made ballet shoes.

She first came to public attention when, aged six years old, she won the talent show Opportunity Knocks. This led to early fame in the television series Just William, the 1974 Broadway revival of Gypsy starring Angela Lansbury, the 1976 film Bugsy Malone, and the 1977 film Wombling Free.

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 Reed 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 audio dramas produced by Big Finish Productions (eleven to date, including the episodes The One Doctor and The Fires of Vulcan).

Source: Wikipedia