The ‘Chase’ presenter, who was previously rumoured to be joining the BBC sci-fi drama, will play Graham, and will be joined in the Tardis newcomers Mandip Gill and Tosin Cole.
The pair will take on the roles of Yasmin and Ryan in the 2018 series, which sees former ‘Broadchurch’ star Jodie take over from current Doctor Peter Capaldi.
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Mandip Gill, Bradley Walsh, Jodie Whittaker and Tosin Cole
BBC
It has also been annoucned Sharon D Clarke will also have a recurring role in the show, but details of her character are yet to be revealed.
Of joining ‘Doctor Who’, Bradley said in a statement: “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!”
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Sharon D Clarke is also joining the show
PA Archive/PA Images
Mandip also said: “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 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.”
Lead star Jodie described the new line-up as a “dream team”, while new showrunner Chris Chibnall, who is taking over from the departing Steven Moffat also said he was “thrilled” to welcome the trio aboard.
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Jodie will take over from Peter Capaldi as The Doctor
BBC
The three new stars replace former companion Bill Potts, who was played by Pearl Mackie.
The character only lasted one series, having joined the show last year, but will return for this year’s Christmas special to mark Peter’s last story as the Doctor.
The new series will then kick of in autumn next year, with a 10 episode run.
Anne voiced a robot version of herself, the hillarious Anne Droid, in the episode 'Bad Wolf'. The Anne Droid fronts a dystopian version of 'The Weakest Link', who obliterates contestants with a laser, rather than the 21st century Anne's acidic putdowns.The episode also saw Davina McCall playing a Davinadroid, who hosted a futuristic version of 'Big Brother' (we suppose that would be an Emmadroid now...). (credit:BBC)
Peter Kay(02 of11)
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Beneath those alarming prosthetics sits Peter Kay, who went all out for his appearance in the episode 'Love & Monsters'.The Northern comedian played The Abzorbaloff, who masqueraded as a human being, in an episode in which The Doctor and his companion featured only briefly.We suppose if you'd splashed out on that costume you'd want it to be seen as much as possible... (credit:BBC)
Kylie Minogue(03 of11)
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Kylie played Astrid Peth, companion to David Tennant's Doctor in the 2007 Christmas special, 'Voyage Of The Damned'.She received a mixed reception for the part, which was created especially for her by producer Russell T Davies, with most of the action taking place on a re-imagined futuristic Titanic.Good boots, too. (credit:WENN)
David Walliams(04 of11)
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Another British comedian who underwent quite the makeover for his 'Who' role.David played the Gibbis in the episode 'The God Complex', a rodent-like alien who encounters Matt Smith's Doctor when he crash-lands in what appears to be an 80s hotel.And you thought 'The Shining' was weird... (credit:BBC)
Suranne Jones(05 of11)
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Suranne had the honour of playing a new incarnation of a 'Doctor Who' staple in 2011, when she took on the role of a humanoid version of the TARDIS.In 'The Doctor's Wife', Surrane plays Idris, a human who takes on the personality of the TARDIS, with Michael Sheen also making a voice appearance in the episode. (credit:BBC)
James Corden(06 of11)
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James played The Doctor's temporary housemate, Craig Owens, in the episode 'The Lodger', which sees The Doctor stranded on Earth, and forced to fit in with everyday humans.He reprised the role in the following series, during which he's married to Sophie (Daisy Haggard), who Matt Smith's Doctor helped him get together with, and they have a baby son. (credit:BBC)
Olivia Colman(07 of11)
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Olivia's 'Doctor Who' role was a fairly ordinary one... oh, unless you count those terrifying gnashers, that is. (credit:BBC)
Keeley Hawes(08 of11)
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Like several guest stars before her, Keeley's appearance in the last series of 'Doctor Who' was only meant to be a one-off stint.However, her appearance as the villainous Ms Delphox was so well-received by Whovians that they can look forward to her reprising the role in the latest series. (credit:BBC)
Derek Acorah(09 of11)
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In a rare moment of self-awareness from Derek Acorah, he appeared in a brief cameo role during the episode 'Army Of Ghosts', joking that he'd no longer be of use once ghosts began to roam the earth.It was a blink-and-you'll-miss-it appearance on a TV screen, but we enjoyed it nontheless. (credit:BBC)
Catherine Tate(10 of11)
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Viewers were so taken with Catherine Tate's portrayal of Donna Noble that she eventually wound up as the Doctor's companion, and went on to become one of the most popular characters of the modern era of 'Doctor Who'. (credit:BBC)
Peter Capaldi(11 of11)
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Does he look a bit familiar to you?Long before he was cast as the Twelfth Doctor himself, Peter Capaldi made an appearance during David Tennant's time as Time Lord, playing Caecillius in an episode set in ancient Pompeii. (credit:BBC)