Dua Lipa, Sir Elton John, Sir Ian McKellen and Florence Welch are among a list of stars calling on the prime minister to update copyright laws in a way that protects them from artificial intelligence.
A letter signed by more than 400 British musicians, writers and artists, addressed to Sir Keir Starmer, says failing to give that protection would mean them "giving away" their work to tech firms.
Also at risk, they write, is "the UK's position as a creative powerhouse".
They want the PM to back an amendment to the Data (Use and Access) Bill that would require developers to be transparent with copyright owners about using their material to train AI models.