Harriet Marston Slater (born 28 November 1994) is an English actress. She is known for her role in the DC Universe series Pennyworth (2019–2022). She was named a 2023 Bright Young Thing by Tatler.

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🎬 Filmography

Screen catalogue →

Fall 2: Deadpoint

2026 · as Jax

Outlander: Blood of My Blood

2025 · as Ellen MacKenzie

Tarot

2024 · as Haley

Pennyworth: The Origin of Batman's Butler

2019 · as Sandra Onslow

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