Harris Dickinson ( born 24 June 1996 ) is an English actor , writer , and director . He is known for his portrayal of Frankie in the 2017 film '' Beach Rats '' , for which he was nominated for Independent Spirit Award for Best Male Lead , London Film Critics Circle Award for Young British/Irish Performer of the Year , and for the Gotham Independent Film Award for Breakthrough Actor . In 2018 , Dickinson portrayed kidnapped heir John Paul Getty III in the first season of the Danny Boyle-helmed FX drama series '' Trust '' . He played Liam Stewart in the science-fiction film '' The Darkest Minds '' ( 2018 ) and will play Prince Phillip in the upcoming film '' Maleficent : Mistress of Evil '' ( 2019 ) . He will have the leading role in the upcoming prequel in the Kingsman franchise and is part of Xavier Dolan 's latest movie Matthias & Maxime which was part of the official selection at the 2019 Cannes Film Festival
2019 Cannes Film Festival
2019 Cannes Film Festival
Harris Dickinson