Donna says "I do!"

Catherine Tate accepts proposal to star in fourth series.

Catherine Tate is set to return to the TARDIS for the complete 13 week run of Series Four of Doctor Who.

Award winning comedian Tate will reprise her role as Donna, the runaway bride from last year's Christmas special, despite turning down the Doctor's invitation to travel with him at the end of that adventure.

When Catherine was asked if she would like to become The Doctor's new companion at the press screening of The Runaway Bride, she replied, "I would love to, but no one has asked!" Well, now they have.

"Catherine was an absolute star in The Runaway Bride and we are delighted that one of Britain's greatest talents has agreed to join us for the fourth series," announced Doctor Who's executive producer and head writer, Russell T Davies. "Viewers can expect more ambitious storylines and a whole host of guest stars in 2008."

Catherine Tate : "I addedam delighted to be returning to Doctor Who. I had a blast last Christmas and look forward to travelling again through time and space with that nice man from Gallifrey."

Freema Agyeman who has played Martha Jones, The Doctor's companion throughout the critically acclaimed third series, will return to the show to join The Doctor and Donna mid series.