Casey married fellow actor Graham MacDuff in 1998.[2] The pair started dating whilst on the national tour of West Side Story.[3]
In 2020, following the COVID-19 pandemic, Casey said that she and her husband had worked as delivery drivers to supplement their income during lockdown due to the lack of work.[4]
Casey trained at Lupino Dance School in Bury. She appeared as Baby June in Gypsy at the Forum Theatre in Wythenshaw, Manchester which starred Josephine Blake and was choreographed by Paul Kerryson. She made her West End debut at age 16 as Rumpleteazer in Cats at New London Theatre.[3] After two years with Cats she then went on to Children of Eden at the Prince Edward Theatre.
In 1998 Casey fulfilled a lifelong ambition by playing Anita in West Side Story, both at the Prince Edward Theatre and on the national tour.[7] It was during this tour she met her husband, Graham MacDuff.[citation needed]
Casey made her first appearance in Chicago as Velma Kelly in 1998, a role she has reprised on numerous occasions.
In 2003 Casey landed the role of Frankie Frayne in the London revival of On Your Toes at the Southbank Centre.[8]
In 2005 she won the TMA (Theatrical Management Association) Award for Best Performance in a Musical[9] playing Mabel in Mack & Mabel at the Watermill Theatre.[10]
She appeared in the BBC Prom alongside the John Wilson Orchestra celebrating the music of Rodgers & Hammerstein. The concert was broadcast on the BBC on Saturday 28 August 2010.[16] She would return to perform with the same orchestra in their 2012 BBC Prom concert entitled 'The Broadway Sound', bringing the concert to a close with an encore performance of Tap Your Troubles Away from Mack and Mabel.[17]
In 2017 she recorded two songs for the album Wit & Whimsy - Songs by Alexander S. Bermange.[citation needed]
In January 2018, it was announced that Casey would play the role of Annie in the UK tour of Calendar Girls, which was due to open at the Leeds Grand Theatre in August 2018.[19]
Casey was in the original cast of the 2021 revival of Cabaret starring Eddie Redmayne, in which she played Frauline Kost and understudied the role of Frauline Schneider, a role she played numerous times. Whilst in Cabaret she appeared in the Stephen Sondheim tribute concert Old Friends, which was subsequently broadcast on television. She left Cabaret to appear with Sir Ian McKellen in the national tour of Mother Goose.[citation needed]
