In 1990 she was a featured vocalist, along with Robin Wright, on a dance version of "California Dreamin'" by the studio group The Midnight Shift, reaching no 1 in the Hi Energy charts.
As an actress she has appeared at the Royal National, the West End and Regents Park Open Air theatres (nominated for an Olivier Award for Best Supporting Performance for the latter's production of Kiss Me, Kate).
She was cast in many television series including Waiting for God, Spooks, Trial & Retribution, Numbertime, Endeavour, The Nevers and in the films The Danish Girl, Blithe Spirit and Christopher and His Kind.
For five years, from 1994 to 1999, Randwyck was a member of the group Fascinating Aïda, having been recommended to Dillie Keane by Victor Lownes,[2] and was nominated for two Olivier Awards for Best Entertainment.
She is married to the director Edward Hall,[3] with whom she worked on Spooks, Kingdom, Trial & Retribution and Partners in Crime.