Mia Honey Threapleton: How Kate Winslet’s Daughter Built an Acting Career Under the Radar

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In 2023, Threapleton secured the series regular role of Lady Honoria Marable in Apple TV+’s period adaptation The Buccaneers, loosely inspired by Edith Wharton's unfinished final novel. Set against the collision of aristocratic 1870s London and energetic American wealth, the series adopted a bold, modern musical aesthetic reminiscent of Sofia Coppola's historical work.

Threapleton’s narrative arc became the emotional core of the series. As Honoria, she explored a discreet, poignant romance with Mabel Elmsworth (played by Josie Totah), earning passionate praise from online communities on Reddit and X for her subtle, gentle performance. While other storylines focused on glamorous balls and society scandals, Threapleton brought grounding vulnerability to a character navigating secret domestic affection within a stifling aristocratic social order.

She followed that success with an appearance in Karim Aïnouz’s Tudor psychological drama Firebrand, which debuted in competition at the 76th Cannes Film Festival. Sharing scenes with Alicia Vikander’s Katherine Parr and Jude Law’s volatile King Henry VIII, Threapleton cemented her reputation as a reliable ensemble player capable of thriving in demanding prestige environments.