Billie Piper has replaced Ncuti Gatwa as the Doctor, with the character regenerating during the latest finale.

In an epic two-part finale, viewers saw the Doctor face fellow Time Lady the Rani in an extraordinary battle to save the world.

Gatwa's 15th Doctor made the ultimate sacrifice to save the life of one little girl.

Following this, his regeneration was revealed, with former show star Billie Piper now taking on the mantle.

🔥 SPOILERS! 🔥 Watch the moment we said goodbye to the Fifteenth Doctor and hello to... #DoctorWho pic.twitter.com/QP0KWoj7vQ

Piper is most notably known for playing Rose Tyler when the show rebooted in 2005, companion to both the Ninth and Tenth Doctors, played by Christopher Eccleston and David Tennant respectively.

She replaces Ncuti Gatwa after just his second season as the titular Time Lord.

His portrayal of the Doctor won Gatwa a Best Actor award at the BAFTA Cymru Awards in 2024, as well as nominations for a BAFTA Scotland Audience Award for Favourite Scot on Screen, and Best Actor in a Drama Series at The Critics Choice Television Awards in the US in 2025.

Piper, 42, is the second woman to take on the role of the Time Lord after Jodie Whittaker portrayed the 13th Doctor.

The finale also saw........

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