Doctor Who’s Ncuti Gatwa looks dapper as he goes shirtless beneath a grey suit while co-star Millie Gibson looks glamorous in red at series premiere before pair switch on the London Eye Christmas lights

Ncuti Gatwa cut a dapper figure as he stepped out with a glamorous Millie Gibson to the premiere of Doctor Who at the BFI Southbank in London on Monday, with the pair switching on the London Eye Christmas lights at the event.

Actor Ncuti, 31, finally made his first appearance on screen as the 15th Doctor when David Tennant’s incarnation of the character regenerated during the third and final 60th anniversary special on Saturday night.

The Sex Education star will be back on screens in the BBC sci-fi programme in 2024 with Millie, 19, taking on the role of the Doctor’s new companion Ruby Sunday.

Screen star Ncuti showed off his chic fashion sense as he went shirtless beneath a long-sleeved grey jacket which he tucked into a pair of matching trousers.

He boosted his height as he stood arm-in-arm with Millie as he opted for a pair of patent black boots with stacked heels.

Millie gave a glimpse at her midriff in a red two-piece ensemble which featured a crop top with a flat bow on the front.

She wore a floor-length dress in the same colour, with the garment featuring a thigh-high split.

The actress added a few inches to her stature by wearing a pair of black heels for the evening.

Ncuti and Millie were seen posing with fellow cast members Michelle Greenidge, Anita Dobson and Angela Wynter at the event.

Michelle, 54, who plays the character of Carla in the upcoming series in an olive brown top and a matching headdress.

She wore some brown trousers and completed her look by wearing a pair of flats in a different shade of the same colour.

Anita, 74, who plays Mrs. Flood, wore a chic black dress and matching heels, while Angela, 66, who plays Cherry, opted for an all-black ensemble for the premiere.

Doctor Who drew in a peak of 6.2M viewers for Ncuti Gatwa’s much-anticipated debut as the 15th Time Lord on Saturday.

The third and final special to mark the sci-fi series’ 60th Anniversary saw David Tennant’s brief return to the role end when he regenerated into Sex Education star Ncuti, 31.

However, all was not as it seemed as a huge twist saw both versions of the Doctor remain on screen, in a huge move away from tradition on the long-running show.

The much-anticipated episode pulled in around 4.5million average viewers with a peak of just more than 6million, according to new overnight ratings.

In comparison, Jodie Whittaker’s last ever episode as she bowed out of the role only racked in 3.6million average viewers with a peak of 4million.

Ncuti’s debut came when ‘creepy’ returning villain The Toymaker, played by Neil Patrick Harris, shot David’s Doctor through the chest, forcing him to regenerate.

The Toymaker had turned human beings on Earth mad, before challenging the Doctor to a deadly game – which put the planet at stake – forcing the Time Lord to accept to try and save Earth.

Shooting the Doctor, The Toymaker said: ‘I played one game with the First Doctor, I played the second with this Doctor, so your rules declare that I must play the third game with the next Doctor!’

His companions Donna Noble (Catherine Tate) and the returning Melanie Bush (Bonnie Langford) ran over to support him as he regenerated, with fans expecting that to be the end for David’s character.

Melanie reassured him: ‘You’re going to be someone else, it doesn’t matter who, because every single one of you is fantastic!’

While David tearfully said: ‘It’s time, here we go again! Alonzee,’ as he expected to be replaced, but a huge twist saw his character remain alongside his new incarnation.

As he remained after the regeneration, he asked Donna and Melanie: ‘Could you, pull? It feels different this time,’ and as they yanked on his arms, Ncuti shot out of him and the two Time Lords stood alongside each other in a massive twist.

Making his hotly-anticipated debut, Ncuti’s Doctor shouted: ‘No way!’ as he laid eyes on David, moving away from tradition which normally sees one Doctor replace another upon regeneration.

David said: ‘You’re me,’ while Ncuti replied: ‘No, I’m me. I think I’m really, really me! Oh-ho-ho I am completely me!’

When asked what had happened, Ncuti’s Doctor said: ‘Bi-generation, I have bi-generated. There’s no such thing, bi-generation is supposed to be a myth, but-!’

The pair of Doctors then used their talents to face off with The Toymaker together and incredibly managed to beat him at his own game, sending the villain out of existence forever.

David’s Doctor said: ‘Best of three, and my prize, Toymaker, is to banish you from existence, for ever!’

‘No, you can’t. But I – not fair, please,’ the Toymaker said, before giving the ominous warning: ‘My legions are coming.’

However, it appears that it is not the end, as a mystery hand was seen picking up the Toymaker’s gold tooth as it was left behind – after The Toymaker had told the Doctor how he defeated villain The Master and trapped him in the tooth.

After banishing The Toymaker from the world, both David and Ncuti’s versions of the character stayed on screen, and went back to the TARDIS with Donna.

David asked Ncuti: ‘How’s this going to work, you and me?’ as the huge twist saw two Doctors remain after a regeneration for the first time ever.

Ncuti told him: ‘You’re thin as a pin love, you’re running on fumes,’ before urging him to slow down and ‘stop’ rather than running and travelling in the TARDIS.

Ncuti then paid tribute to a whole host of former companions, including the late Elisabeth Sladen, who portrayed Sarah Jane Smith and sadly died in 2011.

‘Sarah Jane has gone, can you believe that for a second?’ Ncuti said as they sweetly paid tribute to the iconic actress.

Ncuti then told David’s Doctor to try and lead a life of his own, to which David said: ‘I’ve never let the TARDIS go, never, that would hurt.’

In another huge twist, Ncuti managed to transform the one TARDIS into two separate time machines as a ‘reward’ for them winning the game against The Toymaker, under his rules where games override logic.

The episode ended with Ncuti heading off for more time-travelling adventures in the TARDIS, while David stayed on Earth with Donna and her family in a sweet happy ending for David’s character after he briefly returned to the role.