Harriet Slater

Harriet Marston Slater, born on November 28, 1994, is a talented English actress recognized for her compelling performances across both television and theatre. She gained prominence through her role as Sandra Onslow in the DC Universe series *Pennyworth* (2019–2022) and is set to feature in the upcoming MGM+ period drama *Belgravia: The Next Chapter* in 2024. In 2023, she was celebrated as one of Tatler's Bright Young Things, highlighting her rising star status.

Originating from Leicester, Slater grew up in a family involved in amateur theatre, which sparked her interest in acting at an early age. She joined the Little Theatre youth group at just six years old, using acting as an outlet for her anxiety. Influenced by the likes of Lindsay Lohan and Jane Fonda, she pursued her passion and graduated with a Bachelor of Arts in Acting from the Guildford School of Acting in 2016.

Following her graduation, Slater made a remarkable debut in regional theatre with *The Man with the Hammer* at Theatre Royal, Plymouth. She later showcased her talent in a Royal Shakespeare Company production of Phil Porter's *Vice Versa* at the Swan Theatre and in *The Secret Seven* at Storyhouse. Slater's film career began with the indie fantasy *Emily and the Magical Journey* in 2020, followed by a small role in *Indiana Jones and the Dial of Destiny* (2023). She will also portray Clara Trenchard in *Belgravia: The Next Chapter* and has been cast as Ellen MacKenzie in the *Outlander* prequel series, *Outlander: Blood of My Blood*.