Sienna Spiro (born 25 September 2005) is a British singer-songwriter. After sharing various viral singing videos on TikTok, she began releasing singles from 2024, including the UK No. 45 hit "Maybe". She released Sink Now, Swim Later, her debut extended play, in February 2025. Her breakthrough success came with the release of "Die on This Hill", which reached No. 9 in the UK Singles Chart in November 2025. Spiro was born in the 2000s in London.[1] She is the daughter of jeweller Glenn Spiro and his wife, Arabella.

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