Dan Fredenburgh (born Daniel Rauff Fredenburgh, 1968, in Clapham, London, England) is a British actor and screenwriter, 6′ 2″ (188 cm) tall, raised on a commune and a North Londoner since age ten. He trained at the Arts Educational Schools in London and earned an Ian Charleson Award commendation for the title role in the Royal Shakespeare Company's The Prince of Homburg (2002). On stage he has performed in Stephen Daldry's An Inspector Calls, Aaron Sorkin's A Few Good Men (with Rob Lowe), Noises Off (Theatre Royal Bath), Pig Farm (St James Theatre, 2015, with Stephen Tompkinson), The Duchess of Malfi, Love's Labour's Lost (Rose Theatre Kingston), and Children of Lesser God (Salisbury Playhouse). His most notable film credits include Jimmy in The Bourne Ultimatum (2007, with Matt Damon), Jamie's Bad Brother in Love Actually (2003, with Hugh Grant and Emma Thompson), Osborne in Adults in the Room (2019, with Mark Rylance), Frank in The Courier (2019), Joss in Rise of the Footsoldier 3 (2017), and Jake in Broken Lines (2008, which he also co-wrote). On television he is best known as John Knightley in Emma (2009, BBC, 4 episodes), Armand in Spies of Warsaw (2013, 3 episodes), and series regular Greg Hunt in Bad Girls (2001), with additional credits in Holby City (2003–2013), Silent Witness (2007–2016, 4 episodes), Victoria (2017), The Missing (2014), Sons of Liberty (2015), Fifteen-Love (2023), This England (2022), A Confession (2019), and The Good Ship Murder (2023–present).