“Doctor Who” Companion Millie Gibson Exits the Show After One Season

Millie Gibson at the premiere of 'Lorraine' in 2022
Millie Gibson at the premiere of 'Lorraine' in 2022. Photo by Ken McKay/ITV/Shutterstock (13038731r)

Millie Gibson is the latest Doctor Who companion to join the Time Lord on his intergalactic adventures, but her journey has been cut short. The young actress abruptly exited the cult sci-fi series after one season and she’s set to be replaced by Andor star Varada Sethu.

Gibson appeared alongside the Ncuti Gatwa in the 2023 Christmas special “The Church on Ruby Road”, and fans of the show welcomed her character Ruby Sunday with open arms. It was quite a shocker to see her announce her exit after a single season, without giving a reason for her sudden departure.

Gibson will be back as Rubby Sunday when Doctor Who returns for Season 14 in May, which has already been filmed, but she’s expected to depart the show ahead of Season 15. Gatwa bid farewell to Gibson on social media, by sharing a photo of their Doctor Who characters, which he captioned with words “my lil” and Gemini and heart emojis.

When Doctor Who returns for Season 15, Andor star Varada Sethu will take over from Gibson as Gatwa’s next companion. A source close to production told BBC that she is “a real gem” and that showrunner Russell T Davies was “just blown away by her talent.”