When Jodie Whittaker takes over as the Thirteenth Doctor on the global hit show next year, she will be joined by an all new regular cast including The Chase host.
Bradley and Jodie will be joined by Tosin Cole and Mandip Gill.
Bradley will star as Graham, Tosin will play Ryan and Mandip will play Yasmin. Also joining the series in a returning role is Sharon D Clarke.
New head writer and executive producer Chris Chibnall, who made the decision to cast the first ever woman in the iconic role, is also shaking up who will travel with the Doctor in the TARDIS, with a team of new characters.
The BBC has also confirmed it is confirmed that the new series will be a ten week run of fifty minute episodes in Autumn 2018, kicking off with a feature length hour for the opening launch.
Chris Chibnall says: “The new Doctor is going to need new friends. We’re thrilled to welcome Mandip, Tosin and Bradley to the Doctor Who family. They’re three of Britain’s brightest talents and we can’t wait to see them dive into brand new adventures with Jodie’s Doctor. Alongside them, we’re delighted that Sharon D Clarke is also joining the show."
Jodie Whittaker said: "I am so excited to share this huge adventure with Mandip, Tosin and Bradley. It's a dream team!"
Bradley Walsh added: “I remember watching William Hartnell as the first Doctor. Black and white made it very scary for a youngster like myself. I was petrified but even though I’d watch most of it from behind the sofa through my fingers, I became a fan.
"I then queued up for ages to get into the Carlton picture house in Watford to watch the great Peter Cushing appear as the Doctor in a full length feature film made in glorious colour. Am I thrilled to be part of this whole ground breaking new dawn for the Doctor?? Oh yes!”
Mandip Gill commented: “I am over the moon to be joining the Doctor Who family. This is an iconic show with an amazing fanbase and I look forward to everything that brings. Certain roles seem unattainable and this is one of those, so much so I didn't believe it to be true for the first few weeks.
"To be working alongside the likes of Jodie, Bradley and my old friend Tosin is thrilling. This show is worlds away from the work I've done previously and that's the part that excites me the most.”
Tosin Cole added: "I'm grateful and excited to be a part of this journey with the team. I'm looking forward to jumping in this Doctor Who universe."
Doctor Who will return at Christmas for a special episode before the next full series in 2018.