Three weddings and a doctor (THIS CAN’T BE TRUE)

WEDDING fever will hit Doctor Who - with three of the Timelord's former sidekicks getting hitched, TV Biz can reveal.

They will all get wed as Who star David Tennant bows out of the show,

We previously told how all the time-travelling hero's assistants will return for Tennant's final scenes on the BBC1 sci-fi hit later this year.

Wedding belle ... Rose, actress Billie Piper

Fans will see Rose Tyler - played by Billie Piper - marry the half-human clone of the Doctor in their parallel universe.

Meanwhile, Martha Jones (Freema Agyeman) - her replacement as assistant - will tie the knot with Mickey Smith (Noel Clarke).

Tennant will also make a special guest appearance in the CBBC spin-off The Sarah Jane Adventures for the wedding of his former companion Sarah Jane Smith (Elisabeth Sladen).

Wed ... Martha, Freema Agyeman

Executive producer Russell T Davies said: "Viewers thought they may have to wait until November for the next full episode of Doctor Who - but this is an extra special treat."

Comedian Catherine Tate, who plays sidekick Donna Noble, will also reunite with Tennant, 38, for his finale.

He will be replaced in the next series by 26-year-old Matt Smith, who will become the 11th Doctor.

A show source said: "Fans won't be disappointed by the new Doctor and they're in for a treat with the new series - which will include the return of the ultra-scary Weeping Angels."

Meanwhile, we can reveal that Tennant has signed up for even more Doctor Who episodes - as a cartoon.

The Scots star has already recorded seven new animated shorts. They will also feature his real-life girlfriend Georgia Moffett, who played the Doctor's daughter in the 2008 series.

Russell said the six-minute episodes - called Dreamland - will feature "truly exotic aliens and locations, in a beautiful, rich script full of history and imagination".

He added: "Voice recordings have already been completed - including David Tennant as the Doctor of course.

"And we're delighted to welcome Georgia Moffett back to the fold."

Spin-off nuptials ... Sarah Jane, actress Elisabeth Sladen

But Russell said the cartoon series would not see a return for the Doctor's daughter - as Georgia, 24, will be playing a brand new character called Cassie Rice.

The series - which will air on CBBC - will be the second animated Who story to star Tennant.

He appeared in The Infinite Quest two years ago.

Russell will give way to Steven Moffat as the show's lead writer and executive producer in 2010.

But he hinted at yet ANOTHER outing for Tennant as the Timelord.

He said: "With the Doctor's appearance in The Sarah Jane Adventures as special project one, and the Dreamland animation as special project two, it would be nice to round things off for Doctor Who in 2009 with a special project three. We're working on it."

Rumours abound that Russell is working on a Doctor Who movie which could star Tennant.