David Tennant is "committed" to Doctor Who, the BBC insists, despite a report that he is leaving the sci-fi drama.
David Tennant made his Doctor Who debut in 2005
The Sun claimed the actor, 35, planned to depart next year, in the middle of the fourth series of the hit programme.
But he was currently filming the third series, a BBC spokeswoman said, adding that any episodes beyond that had yet to receive the go-ahead.
"When a further series is commissioned, we will be able to confirm his involvement," she said.
Doctor Who will return to BBC One in the spring, following a Christmas special featuring comedian Catherine Tate.
Freema Agyeman will co-star alongside Tennant as the Doctor's new companion after the departure of Billie Piper at the end of the last series.
Freema Agyeman (l) will play the doctor's assistant
Spooks actress Miranda Raison, Holby City's Hugh Quarshie and Ryan Carnes of Desperate Housewives will also make appearances.
Earlier this month Tennant was named the best Doctor in a poll of 4,000 readers of Doctor Who magazine, beating Tom Baker into second place.
For two years running the show has scooped three prizes at the National Television Awards.