Mia Honey Winslet Threapleton (born 12 October 2000) is an English actress. The daughter of actress Kate Winslet and painter-filmmaker Jim Threapleton, she made her film debut at the age of 13 with a non-speaking cameo in the period drama A Little Chaos (2014). On television, she co-starred with her mother in the episode "I Am Ruth" (2022) of the anthology series I Am..., and appeared in the period drama series Dangerous Liaisons (2022) and The Buccaneers (2023–2025). She had her first lead role in a feature film in the black comedy The Phoenician Scheme (2025).
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Early life
Mia Honey Winslet Threapleton was born on 12 October 2000 in London to actress Kate Winslet and painter-filmmaker Jim Threapleton. Her parents divorced in 2001. Her name Mia means "mine" in Italian and has no family significance associated with it; her parents just found it beautiful. She has four half-siblings; actor Joe Anders (born 2003) from her mother's second marriage to film director Sam Mendes, another half-brother (born 2013) from her mother's third marriage to English businessman Edward Abel Smith, and two half-sisters from her father's second marriage. Her maternal grandmother worked as a nanny and waitress, and her maternal grandfather was a struggling actor who took labouring jobs to support the family. Her paternal grandfather, Edward ‘Ted’ Threapleton, is a Royal Air Force Officer. She has Irish and Swedish ancestry through her mother. Her maternal great-grandparents were both actors and ran the Reading Repertory Theatre Company. Her step-father, Edward Abel Smith, is the former head of marketing promotion and astronaut experience at Virgin Galactic and the nephew of the company's co-founder, English business mogul Richard Branson. After marrying Winslet in 2012, Abel Smith became a stay-at-home dad helping her raise her children.
