It is with great news that I inform you, Daivd Tennant and Billie Piper (10th Doctor and Rose Tyler) till appear in the 50th Anniversary special in November, alongside current doctor and companion, The Doctor and Clara (Matt Smith and Jenna-Louise Coleman).

Edit: It was later confirmed on Twitter by BBC reporter, Lizo Mzimba that they would both return.

The BBC officially confirms the return of David Tennant and Billie Piper for the 50th anniversary @bbcdoctorwho special.
— lizo mzimba (@lizo_mzimba) March 30, 2013

It was heavily rumoured earlier this morning before Lizo's tweet, but after an early distribution of the latest issue of Doctor Who Magazine, it is confirmed within an article that they are both set to appear, confirming those rumours, a low-resolution image is shown below.

With thanks to John Bond for the picture!