Actor

An actor or actress was someone who portrayed a character in comedic or dramatic production.

The Third Doctor considered William Shakespeare a "charming fellow," but a "dreadful actor." (TV: Planet of Evil)

Richard Mace was an actor in 17th century Earth. When he encountered the Fifth Doctor, Mace had become a highwayman since the theatrical industry had been stopped by plague. (TV: The Visitation)

Edmund Trevithick was an English actor who was best known for his portrayal of the titular professor in the BBC science fiction series Nightshade from 1953 to 1958. He helped the Seventh Doctor fight the Sentience in 1968 Crook Marsham. (PROSE: Nightshade)

Parallel universe
Sophie was an actress in an alternate Paris who met the First Doctor. She was murdered so her innocent blood could be used to contact the Masksmasters. (PROSE: The Man in the Velvet Mask)