Deirdre Costello (born in Elland, Yorkshire) appeared on Coronation Street in four roles:
- Gina Fletcher, who worked as a housekeeper at 9 Coronation Street for Len Fairclough and Ray Langton in January 1971
- Connie Parker, supervisor at Baldwin's Casuals in January 1988
- Maggie, the proprietress of a cafe in Morecambe where Alison Wakefield was working in December 1999
- A Blackpool B&B landlady in November 2003.
Her other credits include Z Cars, Dixon of Dock Green, Marked Personal, I Didn't Know You Cared, Crown Court, Crossroads, Mind Your Language, Law & Order, The Nesbitts Are Coming, Sounding Brass, The Olympian Way, Grange Hill, Nobody's Hero, Big Deal, Jack the Ripper, The Bill, London's Burning, The Cops, Emmerdale and Dead Man Weds, along with a role in the 1997 film The Full Monty.
On stage, she appeared in productions of Alibi and Nearest and Dearest.
