Greta Isaac is a Welsh singer and songwriter known for alternative pop music. Isaac has four EPs: Pessimist (2021), I Think You’d Hate it Here (2022), Productive Pain (2025), and Dolly Zoom (2025). She was also part of the musical collective Fizz along with fellow musicians dodie, Orla Gartland, and Martin Luke Brown. Fizz released one album, The Secret to Life (2023) before the members announced in July 2024 that the group would be disbanding.