Doctor Who star David Tennant is apparently dating his co-star Georgia Moffett.

Georgia, 23, played the Time Lord’s daughter in a recent episode of the hit BBC sci-fi series and, according to reports in The Mirror, the pair have since become inseparable off-screen, frequently staying at each other’s homes.

A friend of Georgia told the paper: “They have been going out together for a while now but meet up at each other’s houses so as to avoid being spotted by Who fans.

“David can’t really go anywhere without attracting attention and it’s early days, so they don’t want any distractions or fuss made about what’s going on.

“It started with some friendly dinner dates but has progressed quickly and they are now in a serious relationship. Even with his busy schedule, David is making a lot of time to spend with her, so he must really like her.”

Georgia – who has a six-year-old son named Tyler – is the real-life daughter of former Doctor Who Peter Davison. Tennant and Georgia first met while filming scenes for the show in Wales.

David previously dated Thunderbirds actress Sophia Myles. He has also been romantically linked to two female members of the Doctor Who crew.