An Ungentlemanly Act is a 1992 BBC television film about the first days of the invasion of the Falkland Islands in 1982.

[1] The film was written and directed by Stuart Urban, and commissioned to mark the tenth anniversary of the Falklands War.

The film was closely based on the historical record, and all of the major incidents portrayed were drawn from contemporary accounts by those who took part.

Bob Peck plays Major Mike Norman, the commander of the Royal Marines based at Stanley, while Norman himself acted as advisor on the production, and has a small part as a member of the Falkland Islands Defence Force (FIDF).

It won the BAFTA Award for Best Single Drama the following year, and was later shown on television in Argentina.