Doctor Who actors Matt Smith and David Tennant have reportedly begun work on the much-anticipated 50th anniversary special, with a read-through of the script at a secret location.

The pair reportedly teamed up for the initial rehearsal over Easter, joined by current sidekick Jenna-Louise Coleman – who plays Clara Oswald – and Billie Piper, who is reprising the role of Rose Tyler for the special episode.

And the run-through reportedly came ahead of filming the anniversary special, which is due to kick off next week.

The episode – which will be in 3D and, according to the Mirror, is feature-length, will be screened in November to coincide with the 50th anniversary of the show.

Jenna-Louise recently revealed more details about the script in an interview with the US website Vulture.com.

“We start filming it next week. I just got a new draft through, which I’ll read in the plane on the way back,” the actress said.

“It’s completely paying homage to the last 50 years without dwelling on anything. It’s very much about looking forward while celebrating the legacy. And it will be in 3D.”

David Tennant was confirmed at the weekend as being on board the episode, along with Billie Piper.

Speculation continues over whether the other surviving actors who played incarnations of the Doctor – Colin Baker, Tom Baker, Peter Davison, Sylvester McCoy, Paul McGann and Christopher Eccleston – will be involved in the show.

The other actors who played the part – William Hartnell, Patrick Troughton and Jon Pertwee – could also appear via a mix of archive footage and computer technology.