Lindsay Vere Duncan, (born 7 November 1950) is a Scottish actress. On stage, she has won two Olivier Awards (for Les Liaisons Dangereuses and Private Lives) and a Tony Award (for Private Lives). Duncan has starred in several plays by Harold Pinter. Her best known roles on television include: Barbara Douglas in Alan Bleasdale's G.B.H. (1991), Servilia of the Junii in the HBO/BBC/RAI series Rome (2005–2007), Adelaide Brooke in the Doctor Who special "The Waters of Mars" (2009) and Lady Smallwood in the BBC series Sherlock. On film, she portrayed Anthea Lahr in Prick Up Your Ears (1987), voiced the android TC-14 in Star Wars: Episode I – The Phantom Menace (1999) and Alice's mother in Tim Burton's Alice in Wonderland (2010), and played the acerbic theatre critic Tabitha Dickinson in Birdman or (The Unexpected Virtue of Ignorance) (2014).
She was appointed Commander of the Order of the British Empire in the 2009 Birthday Honours for services to drama.
She is also known as Lindsay Vere Duncan.