[2] In 2017 Dennis joined the cast of the UK premiere[3] of Dreamgirls, playing at the Savoy Theatre until January 2019 and starring Amber Riley in the role of Effie White.
[6] During the pandemic Dennis took part in a concert version of Hair, directed by Arlene Phillips in West End's London Palladium in June 2021 (rescheduled from April 2021).
[8] In October-November 2023 they played Martha Percy in the UK Tour of Treason[9] In 2020 Dennis won the Black British Theatre Award (BBTA) for Best Supporting Actress in a Musical for her role in Dear Evan Hansen.
[11] In 2022 Dennis won the BBTA in the category LGBTQIA+ Champion[12] for their work on the fundraising streaming event Turn Up at Cadogan Hall in support of the Black Lives Matter movement.
[13] Among the performers were Melanie La Barrie, Alexia Khadime, Norm Lewis, Trevor Dion Nicholas, Ciara Renee, Danielle Steers and Layton Williams.