Question: Which actor staring in Darkest hour, has been active in television and film since 1964?

full_context: Document 1: The Finest Hours (1964 film): The Finest Hours is a 1964 British documentary film about Winston Churchill, directed by Peter Baylis. It was nominated for an Academy Award for Best Documentary Feature.
Document 2: Alan Rickman: Alan Sidney Patrick Rickman (21 February 1946 – 14 January 2016) was an English actor and director known for playing a variety of roles on stage and on screen. Rickman trained at the Royal Academy of Dramatic Art in London, and was a member of the Royal Shakespeare Company, performing in modern and classical theatre productions. His first big television part came in 1982, but his big break was as the Vicomte de Valmont in the stage production of "Les Liaisons Dangereuses" in 1985, for which he was nominated for a Tony Award. Rickman gained wider notice for his film performances as Hans Gruber in "Die Hard" and Severus Snape in the "Harry Potter" film series.
Document 3: Michael Caine: Sir Michael Caine {'1': ", '2': ", '3': ", '4': "} ( ; born Maurice Joseph Micklewhite Jr., 14 March 1933) is an English actor, producer, and author. Renowned for his distinctive working class cockney accent, Caine has appeared in over 115 films and is regarded as a British film icon.
Document 4: Dunkirk (2017 film): Dunkirk is a 2017 war film written, co-produced, and directed by Christopher Nolan that portrays the Dunkirk evacuation of the Second World War. Its ensemble cast includes Fionn Whitehead, Tom Glynn-Carney, Jack Lowden, Harry Styles, Aneurin Barnard, James D'Arcy, Barry Keoghan, Kenneth Branagh, Cillian Murphy, Mark Rylance, and Tom Hardy. Distributed by Warner Bros. Pictures, the film is a co-production between the United Kingdom, the United States, France, and the Netherlands.
Document 5: Robert Hardy: Timothy Sydney Robert Hardy, CBE, FSA (29 October 1925 – 3 August 2017) was an English actor who enjoyed a long career in the theatre, film and television.
Document 6: Rachel Pickup: Rachel Pickup is an American / British theatre, television and film actress best known for her role in "Wonder Woman", starring Gal Gadot directed by Patty Jenkins. Her first major role was the leading role of Kaye Bentley in the 10 part BBC TV series "No Bananas", with Alison Steadman and Tom Bell.
Document 7: Their Darkest Hour: Their Darkest Hour: People Tested to the Extreme in WWII, is a book written by Laurence Rees which explores the stories of soldiers and civilians involved in the second world war. It examines the experiences of Western Allied soldiers during the war, as well as the experiences of Axis and Soviet soldiers. The stories are told in the format of short stories, between five and ten pages long, with the stories sub-categorised, displaced persons, POW's etc. Unlike other books written by Laurence Rees it is not a companion to a television series.
Document 8: Patrick Stewart: Sir Patrick Stewart {'1': ", '2': ", '3': ", '4': "} (born 13 July 1940) is an English actor whose career has included roles on stage, television, and film in a career spanning almost six decades. He is a multiple time Olivier, Golden Globe, Emmy, Screen Actors Guild and Saturn Award nominee.
Document 9: War Horse (film): War Horse is a 2011 British war drama film directed and co-produced by Steven Spielberg from a screenplay written by Lee Hall and Richard Curtis, adapted from English author Michael Morpurgo's 1982 novel of the same name. The film's cast includes Jeremy Irvine (in his film acting debut), Emily Watson, David Thewlis, Tom Hiddleston, Benedict Cumberbatch, Eddie Marsan, Niels Arestrup, Toby Kebbell, David Kross and Peter Mullan. Set before and during World War I, it tells of the journey of Joey, a bay Thoroughbred horse raised by British teenager Albert (Irvine), as he is bought by the British Army, leading him to encounter numerous individuals and owners throughout Europe, all the while experiencing the tragedies of the war happening around him.
Document 10: Hugh Paddick: Hugh William Paddick (22 August 1915 – 9 November 2000) was an English actor, whose most notable role was in the 1960s BBC radio show "Round the Horne", in sketches such as "Charles and Fiona" (as Charles) and "Julian and Sandy" (as Julian). Both he and Kenneth Williams are largely responsible for introducing the underground language polari to the British public.
Document 11: The Darkest Hour (film): The Darkest Hour is a 2011 science fiction thriller film directed by Chris Gorak and produced by Timur Bekmambetov. It depicts an alien invasion. The film stars Emile Hirsch, Max Minghella, Olivia Thirlby, Joel Kinnaman and Rachael Taylor, as a group of people caught in the invasion. The film was released on December 25, 2011 in the United States.
Document 12: Ronald Pickup: Ronald Alfred Pickup (born 7 June 1940) is an English actor who has been active in television and film since 1964.
Document 13: The Mercy: The Mercy is an upcoming British biographical drama film, directed by James Marsh and written by Scott Z. Burns. It is based on the true story of the disastrous attempt by the amateur sailor Donald Crowhurst to complete the "Sunday Times" Golden Globe Race in 1968 and his subsequent attempts to cover up his failure. The film stars Colin Firth, Rachel Weisz, David Thewlis, Ken Stott, and Jonathan Bailey. Principal photography began in the UK on 20 May 2015.
Document 14: Battle of Britain (film): Battle of Britain is a 1969 British Second World War film directed by Guy Hamilton, and produced by Harry Saltzman and S. Benjamin Fisz. The film documented the events of the Battle of Britain. The film drew many respected British actors to accept roles as key figures of the battle, including Sir Laurence Olivier as Hugh Dowding and Trevor Howard as Keith Park. It also starred Michael Caine, Christopher Plummer and Robert Shaw as Squadron Leaders. The script by James Kennaway and Wilfred Greatorex was based on the book "The Narrow Margin" by Derek Wood and Derek Dempster.
Document 15: Darkest Hour (film): Darkest Hour is a 2017 British war drama film directed by Joe Wright and written by Anthony McCarten. The film stars Gary Oldman as Winston Churchill, and follows his early days as Prime Minister as Hitler closes in on Britain in World War II (The Darkest Hour). Ben Mendelsohn, Kristin Scott Thomas, Lily James, Stephen Dillane, and Ronald Pickup also star.
ground_truth: Ronald Pickup