Grant appeared in three Lombard films: "Sinners In The Sun," when he was just starting as a film actor; "The Eagle And The Hawk," an ensemble piece where Lombard has a small role; and their only co-starring effort, "In Name Only," a solid 1939 romantic drama which also features Kay Francis.
Some pictures of Carole and Cary from "In Name Only":
And here's one of Grant, Lombard and their fellow cast members on NBC's short-lived "The Circle" series...but look who's "romancing" Carole -- not Cary, but Groucho Marx!