David Tennant and Catherine Tate reprising Doctor Who roles for 60th anniversary celebrations

David Tennant and Catherine Tate are reprising their Doctor Who roles to celebrate the show's upcoming 60th anniversary.

The Scottish actor, who played the 10th Doctor, and comedian/actress, who portrayed his companion Donna Noble, are currently filming scenes for the sci-fi show's 60th anniversary celebrations, which will air in 2023.

The duo fronted the show between 2005 and 2010 and ended with the Doctor wiping Donna's memory to save her life.

In a statement, showrunner Russell T. Davies addressed concerns about how Donna's storyline would continue.

"They're back! And it looks impossible - first, we announce a new Doctor," he began, referencing Sex Education star Ncuti Gatwa's reveal as the next Doctor, "and then an old Doctor, along with the wonderful Donna, what on earth is happening?"

Russell teased, "Maybe this is a missing story. Or a parallel world. Or a dream, or a trick, or a flashback. The only thing I can confirm is that it's going to be spectacular, as two of our greatest stars reunite for the battle of a lifetime."

David previously returned for the show's 50th anniversary episode in 2013, teaming up with then-Doctor Matt Smith as part of the celebrations.

David and Catherine's 2008 series of Doctor Who remains the show's most popular since its 2005 revival, with it bringing in eight million viewers per episode on average.

Ncuti will take over from Jodie Whittaker as the Time Lord later this year.