Lacey is best known for her roles as Irene Stuart (series 4) in Monarch of the Glen, the feisty Dr. George Woodman in Casualty (having previously made two guest appearances in the series as patients in 1991 and 1994), and ditzy but kind-hearted Hilary in May to December. She has also played a number of roles in The Bill and many other TV series.
In 1992 she appeared in the film Carry On Columbus and followed it up in 1996 with an appearance in the BBC/WGBH comedy Heavy Weather written by P.G. Wodehouse and starring Peter O'Toole. She has appeared in a number of theatre productions including a season with Alan Ayckbourn in Terry Johnson's Dead Funny in the West End and Amy's View by David Hare.
Lacey and her husband Paul Harrison have a son, Charlie, born in November 2002, and a daughter, Betsy, born in November 2005. She has also appeared supporting the One campaign founded by Actress Claire Goose's brother Duncan, selling bottled water in order to fund projects to provide clean drinking water around the world particularly in Africa. The campaign advert featured Lacey, Claire Goose, David Tennant, Hugo Speer and Ian Kelsey. She has also provided a number of TV advertising voiceovers.
