The legacy of The King's Speech lives on: King George VI and his wife are to make a return to the big screen in Hyde Park on the Hudson, an adaptation of a BBC radio play, directed by Roger Michell. The production will be bankrolled by Film4, who apparently passed on funding The King's Speech in their eagerness to get this film about the monarch off the ground.

But there's no word on who will play the royal couple this time round, and indeed this time the characters are supporting, rather than the leads. The main focus of the story is the love affair between US president Franklin D Roosevelt and his distant cousin Margaret Stuckley, which comes to a head in June 1939, when the American leader was visited at his upstate New York cottage by Bertie and Elizabeth. Michell is reportedly courting Bill Murray to star as FDR.

Richard Nelson has adapted his own play, which was originally broadcast in 2009 to commemorate the 70th anniversary of the trip. In that version the late Corin Redgrave and his real-life wife Kika Markham played Bertie and Elizabeth, with Tim Pigott-Smith as the president and Julia Swift as Eleanor Roosevelt. Sylvia Syms played Roosevelt's mother; three years previously, she played the Queen Mother in Stephen Frears's The Queen.