Alec Guinness

as Maj. Jock Sinclair, D.S.O., M.M.

John Mills

as Lt. Col. Basil Barrow (Battalion Commander)

Dennis Price

as Maj. Charles 'Charlie' Scott, M.C. (Battalion Executive Officer)

Kay Walsh

as Mary Titterington

Susannah York

as Morag Sinclair

John Fraser

as Cpl. Piper Ian Fraser

Gordon Jackson

as Capt. Jimmy Cairns, M.C. (Battalion Adjutant)

Duncan Macrae

as Pipe Maj. Duncan MacLean