Smiles of a Summer Night

Early in the 20th century, middle-aged lawyer Fredrik Egerman and his young wife, Anne, have still not consummated their marriage, while Fredrik's son finds himself increasingly attracted to his new stepmother. To make matters worse, Fredrik's old flame Desiree makes a public bet that she can seduce him at a romantic weekend retreat where four couples convene, swapping partners and pairing off in unexpected ways.

Synopsis from TMDB

Cast

Gunnar Björnstrand

Fredrik Egerman

Ulla Jacobsson

Anne Egerman

Eva Dahlbeck

Desirée Armfeldt

Harriet Andersson

Petra

Margit Carlqvist

Countess Charlotte Malcolm

Jarl Kulle

Count Carl Magnus Malcolm

Åke Fridell

Frid

Björn Bjelfvenstam

Henrik Egerman

Cast and crew data from TMDB