Miller was born in Carrington. She is the daughter of Cassandra (née Stevens), a school teacher from Boguestown, and Roland, a television producer for CBC. Miller has two older siblings; Edward (1947) and Sarah (1950). Edward works as Miller's agent since 1988 and Sarah is a former teacher.
Miller was interested in studying psychology at the Carrington College. However, she decided to follow a career in cinema, after the exhortation of Frederick Barlowe, the director of Inspector 64 TV series and old friend of her father.
Her first important role came with Michael Maybury's The Crimson Blouse (1980). She subsequently had the leading role in the successful The Smiling Teacher (1981) and a secondary one in the legendary The Wolf (1983). At the time, Miller was described by some critics as "the most promising actress of the country".
In 1984, Miller starred in The Good Man as a young police officer opposite Philip Rennet and Jan Soomer-Delsen, winning her first Barker Award for Best Actress at RFF. She won her second award on her very next film, The Tears of a Clown (1987), portraying Joanna Gorga.
In 2006, Miller played the role of Giovanna Tolentino, a character based on Fabiana Capello, for John Fadaaq's Mob Wars. Her performance earned her a Barker Award for Best Supporting Perfromer at the Rosetown Film Festival. Three years later, she portrayed Princess Andrea Marie, Karl Van Draak's mother, at the 1663 miniseries.
In 2013, Miller had the leading role as Violet Fordham in the thriller A Dark Place and received her fourth nomination for the Barker Award for Best Actress, which she eventually won. Shortly after finishing the filming of this movie, she announced she would be taking an indefinite break from acting.
Since 2009, Miller is the president of the Koningstad Mediterranean Film Festival.
Miller was married to popular singer and actor Lucas Prat, from 1977 until 2000, they had no children. In 2005, she reportedly had a brief romantic relationship with Alexander Bishop, a cameraman she met while filming Our Relations. Miller is a close friend to director Nathalie Jonker, with whom she has worked extensively.
|1970||Inspector 64||Eve||TV series|
|1971||Strangers||Crying woman||Film debut|
|1973||Milk & Mocha||Prostitute#1||Uncredited|
|1977||Behind the Smile||Charlotte Mosley|
|1980||The Crimson Blouse||Caroline|
|1981||The Smiling Teacher||Eve Thomson|
|1984||The Good Man||Alice Bansworth||Won - Barker Award for Best Actress|
|1987||The Tears of a Clown||Joanna Gorga||Won - Barker Award for Best Actress|
|1989||Dead by June||Louise Hawkins|
|1990||Something, Somewhere||Johanna Mulders|
|1993||I Don't Remember||Emily|
|1994||Another Dawn||Lucinda Roark|
|1996||Shadow Children||Susan Satterlee||Won - Barker Award for Best Actress|
|1999||Perhaps Yes, Perhaps No||Mrs. Winters|
|2002||Our Relations||Joanna Hughes|
|2005||House of Sanity||Brunhilde Claussen||TV series (one episode)|
|Her Black Hair||Alexandra|
|2006||Mob Wars||Giovanna Tolentino||Won - Barker Award for Supporting Performer|
|2009||1663||Princess Andrea Marie||TV miniseries|
|2013||A Dark Place||Violet Fordham||Won - Barker Award for Best Actress|