Louise Alexandra Delamere (born 22 July 1969 in Wallasey, Merseyside) is an English actress, best known for her roles as Lia in the Channel 4 comedy drama No Angels and Colette Sheward in the BBC medical drama Holby City.
Delamere has appeared in Agatha Christie's Poirot: Evil Under The Sun in which she played Arlena Stewart, an actress who is murdered on a beach. She was featured in the Cadfael episode "The Holy Thief" and appeared in the BBC crime show Waking The Dead as Elaine Ashcroft, again playing a murder victim in the fourth season finale Thin Air. She also had a role in the television drama The Chatterley Affair and has appeared in Torchwood. She played the recurring character Marion James in the fifth series of Waterloo Road. Delamere began appearing as regular character, Colette Sheward in BBC medical drama, Holby City in December 2013.
Delamere is married to Stephen Mangan. They have two sons: Harry (born October 2007) and Frank (born 2010).
She has three brothers; her younger brother is the actor Matthew Delamere, and one of her older brothers is the director Robert Delamere.