Harry Treadaway

English stage and screen actor whose credits include Control (2007), City of Ember (2008), Fish Tank (2009), Pelican Blood (2010), Flight of the Storks (2012), Mr. Mercedes (2017–2018), The Crown (2019), Star Trek: Picard (2020), Deceit (2021), and The Chemistry of Death (2023).

Harry's older identical twin brother Luke also became an actor. While at secondary school the twins formed a band called Lizardsun with Matt Conyngham and Seth Campbell. They also both joined the National Youth Theatre. Treadaway studied acting at LAMDA and graduated in 2006.

While still at drama school, Treadaway and his twin brother recorded roles in their first feature film, Brothers of the Head (2005), in which they played conjoined twins in a band. During rehearsals and throughout the shoot, Luke and Harry were connected to each other for fifteen hours a day, wearing sewn-together wet suits or a harness. They also slept in one bed to simulate the conjoined nature of their characters. The Treadaways performed all tracks featured in the film themselves live on stage as well as recording nine tracks for the soundtrack album.

Harry Treadaway and his partner, actress Holliday Grainger, had twins in 2021.