Doctor Who star Matt Smith said he does not want to give up his role as the Time Lord "anytime soon".
The actor is currently filming the second half of the latest BBC1 series which sees him reunited with regular sidekicks Amy Pond (Karen Gillan) and Rory Williams (Arthur Darvill), as well as Alex Kingston, who reprises her role as River Song.
Matt, who recently played novelist Christopher Isherwood in a BBC biopic, said of his role: "It's certainly not a part I want to give up anytime soon, and I love playing it."
The actor - who was named as the 11th Doctor in 2009, replacing David Tennant - made his first screen appearance in 2010.
He revealed he definitely wanted to stick around for this year's Christmas special but said of after that: "Who knows?"
He went on: "I kind of take it a year at a time and I finish shooting this season in a month so thereafter we'll wait and see. There's a Christmas special so I guess that means that everyone will sit down and figure it out but it's certainly something I'm keen to be involved with because I love it, I love playing Doctor Who, or rather the Doctor in Doctor Who - it's a thrilling job so who knows?"
Matt added that model Lily Cole was "wonderful" in her guest role as a mermaid creature in an episode this series, which also sees the Time Lord cross paths with Hugh Bonneville's pirate captain.
:: The new series of Doctor Who will begin on April 23 on BBC1.