When a Man Loves is a 1927 American synchronized sound historical drama film directed by Alan Crosland and produced and distributed by Warner Bros.

The picture stars John Barrymore and features Dolores Costello in the frequently filmed story of Abbe Prevost's 1731 novel Manon Lescaut.

Chevalier Fabien des Grieux, who has forsworn the world for the church, falls passionately in love with young Manon Lescaut when he encounters her en route to a convent with her brother André.

The lustful Comte Guillot de Morfontaine offers André a tempting sum for Manon, and learning of their bargain, Fabien takes her to Paris, where they spend an idyllic week in a garret.

He and director Alan Crosland re-teamed at United Artists to make The Beloved Rogue, another French costume story that was selected because of the popularity of When a Man Loves.