- Country: UK
- Genres: Drama, Romance
- Release: 1949-04-13
- Director: Gregory Ratoff
- Writers: Ben Simcoe , Margaret Kennedy , Ilya Surguchev , Gene Markey
- Language: English | Italian
- Stars: Myrna Loy (1905–1993) , Roger Livesey , Peggy Cummins , Richard Greene , Elizabeth Allan , Gerard Heinz , Jean Cadell , G.H. Mulcaster , Margaret Withers , Ronald Adam
- Runtime: 72 min
- Awards: N/A
- AKA: Frauen im gefährlichen Alter (Austria) , La edad peligrosa (Spain) , Frauen im gefährlichen Alter , That Dangerous Age (Canada) , Vaarallinen ikä (Finland) , Epikindynos ilikia (Greece) , Si esto es pecar (Mexico) , Se Isto é Pecado (Brazil) , That Dangerous Age (United Kingdom) , Den farlige alder (Denmark) , Será Isto Pecado? (Portugal, Portuguese Republic) , Tramonto d'amore (Italy) , Det hände på Capri (Sweden) , Cet âge dangereux (France, French Republic) , If This Be Sin (United States of America) , That Dangerous Age , Si esto es pecar (Argentina)
- Plot: A lonely wife of a workaholic husband on the magical Isle of Capri meets a charming and attractive young man. An exciting affair must end when word gets back to the husband and he becomes ill. Then the daughter enters the scene.
- IMDB:tt0041501
If This Be Sin Cast · · · ALL
Gregory Ratoff
Director
Myrna Loy
(1905–1993)
Lady Cathy Brooke
Roger Livesey
Sir Brian Brooke
Peggy Cummins
Monica Brooke
Richard Greene
Michael Barcleigh
Elizabeth Allan
Lady Sybil
Gerard Heinz
Dr. Thorvald
Jean Cadell
Nannie
G.H. Mulcaster
Simmons
Margaret Withers
May Drummond
Ronald Adam
Prosecutor
Wilfrid Hyde-White
(1903–1991)
Mr. Potts
Henry Caine
Mr. Nyburg
Patrick Waddington
Rosley