Jacob Anderson has joined the 'Doctor Who' cast.

Jacob Anderson

Jacob Anderson

The 31-year-old actor will star as Vinder in the sci-fi series, which will see him join forces with Doctor (Jodie Whittaker), Yaz (Mandip Gill) and Dan Lewis (John Bishop).

Looking forward to his new role, Jacob - who played Grey Worm in 'Game of Thrones' - said: "The Doctor has been a part of my life forever, from watching and re-watching the serials on VHS as a kid and being terrified, to unexpectedly finding my eyes watering when the Tenth Doctor said 'I don't want to go', I always wanted to live in the Whoniverse.

"Not only has a lifelong dream of mine now been fulfilled, but to be playing a character as fun, adventurous and dynamic as Vinder is the cherry on top. This is very cool."

Jacob's casting was announced at the Doctor Who San Diego Comic Con, where he was joined by the likes of Jodie, Mandip, and John, who is also starring in the upcoming series.

The comedy star previously revealed that he was once offered and rejected a role on 'Doctor Who' by showrunner Chris Chibnall.

John explained that touring commitments meant he was unable to commit to the show.

He shared: "I met Chris Chibnall and he had this idea, and this character. He'd seen me in a few things, and he wanted to know if I'd be interested in Doctor Who.

"I was flattered but the problem was I was on tour when they were meant to be filming. So although I fancied it, I had to say no."

Jacob will make his 'Doctor Who' debut when the show returns later this year.