Billie Piper will be starring in three episodes of the popular series.
This news means that Doctor Who will have three assistants in next year's series - Donna, played by actress Catherine Tate, and Freema Agyeman playing the role of Martha.
The new series of Dr Who starts in March 2008 and will run for 13 episodes. The BBC has revealed that there will be three special editions of Dr Who in 2009 before it takes a break again until 2010.
Billie Piper had received a number of awards for her performance as Rose and she was named most popular actress at the National Television Awards in 2005 and 2006.
The new series of Dr Who is currently being filmed in Cardiff, and in it the Doctor encounters his old enemies the Sontarans once again.
