Kennedy made her
West End debut as Cosette in
Les Misérables at the
Queen's Theatre (later the Sondheim Theatre) in 2016. In 2017, she appeared in
Honeymoon in Vegas at the
London Palladium and
South Pacific at
Cadogan Hall. Kennedy continued to perform in
Les Misérables until it closed in 2019 so the theatre could be refurbished, after which she worked as an office temp in between auditions. She starred in a
pantomime production of
Cinderella at the
Cambridge Arts Theatre later in 2019 and gave concerts at Brasserie Zédel and
Rothamsted Manor in 2020. On 22 December 2021 Kennedy rejoined the West End Cast of
Les Misérables as Cosette for a single concert performance. In 2022, she covered the role of
Eliza Doolittle in
My Fair Lady for its West End revival at the
London Coliseum before playing the part in the production's subsequent UK and Ireland tour. The following year, Kennedy appeared in the London production of
Flowers for Mrs Harris at
Riverside Studios. ==Stage==