Billie PiperBillie PiperOooh, Billie Piper, you tricksy little minx.

Finally, her big news is out in the open.

And it's bound to make many a fan delighted.

What is it?

Well, the Daily Mirror reports that Billie has agreed to a surprise comeback in Doctor Who.

Now, the paper reports, the good Doctor will have three assistants, and Billie is set to star in at least three episodes.

They say that the Time Lord, played by David Tennant, starts off with Donna (Catherine Tate), is then joined by Martha (Freema Agyeman) and finally reunites with Billie's character, Rose.

They quote a source as saying: "With Donna, Martha and Rose competing to assist him, Doctor Who is going to be spoilt for choice."

Billie has apparently told the paper: "My mum is the biggest Doctor Who fan ever. I feel bad about not being in this year's Christmas special with Kylie Minogue."