In 2012, she made her West End debut, playing a secretary the main character tries to seduce and then has committed as insane, in the play "What the Butler Saw". Her husband, David Tennant, acted in the same play 17 years, earlier. The 2012 production was not a critical or commercial success and was canceled two months into its run.
Gave birth to her 2nd child at age 26, a daughter Olive Tennant on March 29, 2011. Child's father is her boyfriend (now husband), David Tennant.
She is the daughter of the Peter Davidson (The Fifth Doctor) and the wife of David Tennant (The Tenth Doctor).
After David Troughton, she is the second child of an actor who played the Doctor (Peter Davison) to have a speaking role in Doctor Who (1963) and/or Doctor Who (2005). She, the Doctor's daughter, played the titular part in Doctor Who: The Doctor's Daughter (2008) with David Tennant.
In 2012 Moffett quit acting in order to be a stay-at-home mother. As of 2013 she is trying to become a screenwriter and is working on writing a movie script with some friends.