A cross between Wallace Reid and Rudolph Valentino, McGregor, with slick-back hair, starred as the young whaling captain in a film version of Ben Ames Williams' All the Brothers Were Valiant (1923), perhaps the highlight of a busy career that mostly found the handsome, clean-cut actor supporting such glamorous female stars as Corinne Griffith, Florence Vidor, and Evelyn Brent.
Some of her co-stars of the era included such notable names as Marin Sais, Frank Borzage, Gladys Brockwell, Mildred Harris, Jack Holt, Jane Wolfe, Dagmar Godowsky, Vola Vale, Florence Vidor, Earle Foxe, and Walter Long.
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