Miriam Petche

Petche was born and raised in Brighton, East Sussex. Her father works as an editor and her mother works in education. She has a sister, who is an NHS doctor in Scotland. She studied acting at the Guildhall School of Music & Drama in London.

A child actress, Petche had her first acting role at the age of ten years-old in the BBC Two show Vexed. She went on to appear in children's television series The Worst Witch. She had a role in the stage play Runts in London in 2016, in which she appeared alongside Marisa Abela.

She was still studying at drama school in London when she was cast in the role of Sweetpea Golightly, a trading and sales trainee at financial institution Pierpoint & Co, in the third series of critically-acclaimed HBO Max and BBC One drama series Industry in which she appeared alongside Abela and Harry Lawtey, amongst others. She left drama school before officially graduating in order to film her scenes on location in Cardiff, Wales. Her character is ambitious with a strong work ethic and was in-part inspired by British influencer Molly-Mae Hague. She was described by Collider as the "stealth MVP" of the third series. In May 2025, she was confirmed as returning as Sweetpea for the fourth series.

In August 2025, she was cast alongside Daniel Mays and Aimee-Ffion Edwards in British true crime drama Believe Me, written by Jeff Pope for ITVX.