Fletcher played her final performance as Truly Scrumptious on 2 October 2016.
The production starred Samantha Womack and Les Dennis and was again produced by James Yeoburn and Stuart Matthew Price for United Theatrical, Katy Lipson for Area Entertainment and Music & Lyrics in association with Festival Theatre, Edinburgh In February 2018, it was announced that Fletcher would reprise her role as Beth in the 40th anniversary tour of Jeff Wayne's War of the Worlds, alongside Jason Donovan, who is reprising his role as Parson Nathaniel.
Her career in acting began at the age of five, when she appeared in a short Channel 4 ident before starring in an advert for Honey Nut Cheerios with Frasier actor Kelsey Grammer.
Fletcher has also played several short television roles, including Jenny in the CITV show Dog and Duck.
Fletcher replaced Danielle Hope as Éponine in Les Misérables at the Queen’s Theatre, London in June 2013.
She is the only British actor to play both young Éponine and older Éponine In November 2014, Fletcher took a hiatus from her role in Les Misérables to join the cast of Jeff Wayne’s War of the Worlds national arena tour in which she played the role of Beth, alongside Jason Donovan, Brian Mc Fadden and Shayne Ward.