[1] Kennedy's recent television roles have included Will in Atlanta (season 3), Mark Bolton in Liaison, Neil in Peep Show (series 8), a principal role in ITV's Murder on the Home Front, alongside Tamzin Merchant,[4] a lead opposite Brendan Gleeson in the HBO pilot The Money, Sampson in ITV's Downton Abbey, Jock Colville with Michael Gambon in Churchill's Secret, directed by Charles Sturridge, and recurring roles in Hulu's The First,[1] Mrs Wilson for the BBC, and Allston Wheatley in Scott Frank's The Queen's Gambit for Netflix.
Kennedy's other film roles include Lieutenant Waverly in Spielberg's War Horse,[3] Roger Donaldson's November Man, Bill Condon's Mr Holmes (with Ian McKellen), Babak Najafi's London Has Fallen,[3] Lt. Col.
Guy L'Estrange in Mike Leigh's Peterloo;[1] and as Edward Aveling opposite Romola Garai in Susanna Nicchiarelli's Miss Marx.
[1] In 2018, Kennedy wrote and directed the short film The Human Voice, starring Rosamund Pike, adapted from the Jean Cocteau play La Voix Humaine.
[1] Kennedy portrayed astronaut Michael Collins in the documentary of the Apollo 11 mission, 8 Days: To the Moon and Back, shown on BBC2 on 10 July 2019.