The Winslow Boy is an English play by Terence Rattigan based on an actual incident in the Edwardian era, which took place at the Royal Naval College, Osborne House. The play was later made into a film in 1946.

David Mamet adapted the play in 1999 for the big screen, starring Nigel Hawthorne and Jeremy Northam as Arthur Winslow and Sir Robert Morton, respectively.

Set against the strict codes of conduct and manners of the age The Winslow Boy is based on a father's fight to clear his son's name after the boy is expelled from Osborne Naval College for stealing a postal order. To clear the boy's name was imperative for the family's honour, had they not done so they would have been shunned by their peers and society. The boy's life would have been wrecked by the stain on his character.