Millie Gibson, who played Kelly Neelan, has been unveiled as Ruby Sunday - the companion to Ncuti Gatwa's Time Lord in Doctor Who.
The casting of the Coronation Street actress was revealed live on Friday's Children In Need appeal on BBC One.
Her first episode opposite Ncuti Gatwa's 15th Doctor will be broadcast during the 2023 festive period.
Gibson said she was in disbelief about being cast in the long-running sci-fi drama, adding: "It is a gift of a role, and a dream come true."
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