Holly Mae Muller (born 26 August 1997) is an English singer and songwriter. She first received mainstream recognition after releasing the single "Better Days" in 2021, a collaboration with Swedish music collective Neiked and American rapper Polo G, which went on to chart in the top 40 in both the United Kingdom and United States. She will represent the United Kingdom in the Eurovision Song Contest 2023 on homesoil in Liverpool, with the song "I Wrote a Song", which became the first UK Eurovision entry in over a decade to debut on the UK Singles Chart's top 40.
Muller was raised in a Jewish family in Kentish Town, London to parents Matt Muller and Nicola Jackson. She has a twin brother, Sam. Her grandfather is a child Holocaust survivor who managed to escape to Britain from Germany at age 12, and later moved to Wales.
Muller began writing her own music at the age of eight. Although her parents sought boarding at Kimbolton School in Cambridgeshire, she eventually attended Fine Arts College in Belsize Park, north London. In 2007, as a child, Muller appeared in the music video for "Grace Kelly" by Mika.