David Tennant, who starred as the tenth Doctor in Doctor Who between 2005 and 2011, and his fiancée Georgia Moffett are celebrating the birth of their first child.
Their daughter, Olivia, is Moffett's second child, as she has a nine-year-old son, Ty, from a previous relationship.
Tennant met Moffett on the set of Doctor Who in 2008, when she appeared as his daughter, Jenny, in The Doctor's Daughter – a story written by Stephen Greenhorn, who is most recently remembered for the ITV supernatural drama series Marchlands, starring Alex Kingston, who also appears regularly in Doctor Who.
The couple became engaged in January, but have endeavoured to keep their relationship private. However, according to the Daily Mail, a friend reported, "Georgia and David could not be happier, Olivia is beautiful and their families are over the moon."
Fans of the long-running BBC science-fiction television drama have been quick to point out that "as well as being 'the Doctor's daughter' (Tennant) and 'the Doctor's daughter's daughter' (Moffett), Olivia is also 'the Doctor's grand-daughter', due to the fact that Moffett's father is Peter Davison", who played the fifth Doctor in the show from 1981 to 1984. Her mother is the American actor Sandra Dickinson (The Hitchhiker's Guide to the Galaxy), Davison's first wife.
Tennant, who succeeded Christopher Eccleston's ninth Doctor in 2005, bowed out of Doctor Who on New Year's Day 2010, when Matt Smith became the eleventh actor to take on the role. Smith returns to US and UK television screens for a second series as the 900-odd-year-old Time Lord on 23 April, in The Impossible Astronaut, by Steven Moffat.