[4][5] Stapleton made her West End debut in the cast of Mamma Mia in 2015, covering the role of Ali, as well as being part of the ensemble for the show.
She joined the ensemble of Bat Out of Hell in 2017 with the show touring the UK and returning to London twice, at the Coliseum (2017) and the Dominion Theatre (2018).
[6] In October 2019 she moved to the cast of Dear Evan Hansen, premiering in the UK with Sam Tutty making his West End debut in the title role.
[9] In June 2023 it was announced that Stapleton will join the cast of the summer concert staging of Love Never Dies as Meg Giry.
The version of the musical will be held at the Theatre Royal, Drury Lane and will star Norm Lewis as Phantom and Celinde Schoenmaker as Christine.