The 4.5 minute long take through the Dunkirk beach scenes took under 5 takes to film.
The celebrated 5 1/2 minute tracking shot was done in four takes (the third one was used). It was conceived out of necessity, for the crew only had a day to film and had limited time with the 1,000 extras and had to shoot before the tide would come in and wash away the set.
Shooting the five minute Dunkirk beach scene was arguably the toughest portion of shooting. The shooting schedule dictated that the scene must be completed in two days. However the location scouts report indicated the lighting quality at the beach was not good enough until the afternoon of the second day. This forced director Joe Wright to change his shooting strategy into shooting with one camera. The scene was rehearsed on the first day and on the morning of the second day. The scene required five takes and the third take was used in the film. On shooting, Steadicam operator Peter Robertson shot the scene by riding on a small tracking vehicle, walking off to a bandstand after rounding a boat, moved to a ramp, stepped onto a rickshaw, finally dismounting and moving past the pier into a bar.
Director Cameo: [Joe Wright] Appears during the lengthy tracking sequence on Dunkirk beach.
The Dunkirk street scenes and generator room scenes were filmed on Grimsby Docks.
Joe Wright had wanted Keira Knightley to play the role of Briony in her late teens, but Knightley immediately liked the character of Cecilia, and also wanted to get away from playing girls on the brink of womanhood and play a more mature character for once.
James McAvoy considered the script the best he had ever read.
The opening film of the 2007's Venice Film Festival. Director Joe Wright, at 35, is the youngest director to have a film open this prestigious event.
Local government in Redcar gave permission for a bandstand to be erected and for a shipwreck to be placed on the beach for authenticity. A number of houses along the beach front were painted to suit the era. The cinema, which looked the part already, merely had an advertisement painted on the side of the building to complete the set dressing. Everything was undone after filming was complete and Redcar seafront now looks like a normal seaside town again.
The locals of Redcar, who served as extras in the Dunkirk scene, were paid 50 pounds.
The set of Dunkirk, built at Redcar, was the most expensive set, costing an estimated 1 million pounds.
Release prints were delivered to theaters with the fake title 'Saturday' (which is the title of author Ian McEwan's subsequent, though unrelated, novel).
As Robbie is hauled off by the police and his mother frantically yells "liar" while running up the road, Briony peers from a staircase landing through a window decorated with figures in stained glass. The figure in the window Briony stares through is labeled Matilda. This is an allusion to a famous children's poem by Hilaire Belloc entitled "Matilda", whose first line runs, "Matilda told such dreadful lies, it made one gasp and stretch one's eyes". By the end of the poem, Matilda has burned to death, having called wolf one time too many.
Briony's appearance next to the stained glass window featuring Saint Matilda, may also be a reference to the saint's status as patron of falsely accused people.