Doctor Who star Bradley Walsh 'QUITS his role in the BBC sci-fi show after two ...

Bradley Walsh will reportedly quit Doctor Who following this year's Christmas special.

The TV star, 59, will say goodbye to his role as the Time Lord's assistant Graham O'Brien after two series.

Alongside Bradley, actor Tosin Cole, 27, who plays Ryan Sinclair has also announced he is leaving his role. 

Saying goodbye: Bradley Walsh will reportedly quit Doctor Who following this year's Christmas special

Saying goodbye: Bradley Walsh will reportedly quit Doctor Who following this year's Christmas special

Both actors will appear alongside show star Jodie Whittaker in the sci-fi series' Christmas special this year.

But they are not set to appear in the next series, which will begin sometime in 2021. 

Their exit will be Jodie's Time Lord will just have one companion in the form of police woman Yaz, played by Mandeep Gill. 

A source told The Mirror: 'Two years is a long time in the world of Doctor Who. Yaz will be back but Christmas will be the last outing for Ryan and Graham.'

Moving on: The TV star, 59, will say goodbye to his role as the Time Lord's assistant Graham O'Brien after two series

Mailonline have contacted representatives of Bradley and Doctor Who for comment.

Former Coronation Street star Bradley has previously commented on the gruelling filming schedule for then BBC show.

He told the publication: 'We have great fun doing it. But you must sleep and look after yourself, because if you don’t, you will come unstuck.

'This is 10 months of ramming speed. That’s what it is. I’m in my 60th year. It’s tough. It’s hard. It’s relentless. It really is. This ain't an easy gig.'

Bowing out: Alongside Bradley, actor Tosin Cole, 27, who plays Ryan Sinclair has also announced he is leaving his role

Bowing out: Alongside Bradley, actor Tosin Cole, 27, who plays Ryan Sinclair has also announced he is leaving his role

On the show: Both actors will appear alongside show star Jodie Whittaker in the sci-fi series' Christmas special this year

On the show: Both actors will appear alongside show star Jodie Whittaker in the sci-fi series' Christmas special this year

The star still has several other TV projects to juggle however, namely being host of popular ITV quiz show, The Chase.

He also presents travel show Breaking Dad with his son Barney, while he's also set to front new BBC entertainment series Take Off alongside Holly Willoughby.

Tosin meanwhile has landed a part in new American drama 61st Street.

Telly man: The star still has several other TV projects to juggle however, namely being host of popular ITV quiz show, The Chase

Telly man: The star still has several other TV projects to juggle however, namely being host of popular ITV quiz show, The Chase

Time to go: A source told The Mirror : 'Two years is a long time in the world of Doctor Who. Yaz will be back but Christmas will be the last outing for Ryan and Graham'

Time to go: A source told The Mirror : 'Two years is a long time in the world of Doctor Who. Yaz will be back but Christmas will be the last outing for Ryan and Graham'

Elsewhere, after finishing on a nail-biting cliffhanger, Doctor Who's eagerly-awaited return will be for a festive special, it has been announced.

With the fate of the Doctor hanging in the balance amid the Great CyberWar and return of The Master at the end of Series 12, fans will have to wait until December to see how the action unfolds.   

The identity of the Timeless Child was finally revealed, throwing everything fans know about the Doctor into question.

Christmas special: With the fate of the Doctor hanging in the balance at the end of Series 12, fans will have to wait until December to see how the action unfolds

Christmas special: With the fate of the Doctor hanging in the balance at the end of Series 12, fans will have to wait until December to see how the action unfolds

Jodie Whittaker will be back as the near-immortal Time Lord in the upcoming festive episode curiously titled Revolution of the Daleks.

This can only mean that the Doctor's biggest and most feared enemies, the Daleks, will be front and centre in shaping the next series, set to be Jodie's last.

Showrunner Chris Chibnall said: 'We can't leave the Doctor there! On that cliffhanger! Well, we did.

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'But rest

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