Siena Kelly

Siena Nicole Kelly (born 1996) is a British actress. She earned a British Academy Television Award nomination for her performance in the Channel 4 drama Adult Material. She has since played the titular character in BBC Three fantasy series Domino Day (2024) and appeared in the Netflix anthology Black Mirror (2025). Kelly is also known for her stage work, earning an Ian Charleson nomination.

Early life Kelly was born in the North London Borough of Camden. She initially trained as a dancer and performed in dance competitions. She graduated from Arts Educational School (ArtsEd) in 2017. She is a certified yoga instructor and teaches in London when she is not working as an actor.

Career After graduating from ArtsEd, Kelly made her professional stage debut as Ivy Green in On the Town at Regent's Park Open Air Theatre. For her performance, she was nominated for Best Actress in a Musical at The Stage Debut Awards. Later that year, she appeared in A Christmas Carol at the Old Vic with Rhys Ifans.

Kelly made her television debut as Rhoda Swartz in the 2018 miniseries adaptation of Vanity Fair on ITV. The following year, she played Michelle Wilson in the first series of the Sky One medical crime drama Temple. She appeared in Teenage Dick at Donmar Warehouse in 2019.

In 2020, Kelly starred as Amy Deighton in the Channel 4 drama miniseries Adult Material. For her performance, she was nominated for Best Supporting Actress at the 2021 British Academy Television Awards. Also in 2021, she had a role in Cat on a Hot Tin Roof at the Curve Theatre.

Kelly returned to the Donmar Warehouse in 2022 for Force Majeure, and also appeared in That is Not Who I Am at the Royal Court Theatre. She stars in the 2024 BBC Three fantasy series Domino Day as the titular character.

Filmography

Stage Sheffield 2025 1536 Anna Almeida Theatre, London

Awards and nominations Year Award Category Work Result 2017 The Stage Debut Awards Best Actress in a Musical On the Town 2021 British Academy Television Awards Best Supporting Actress Adult Material 2025 Ian Charleson Awards A Doll's House