Who picked up his only Best Actor award for playing composer George M. Cohan in 1942's biopic "Yankee Doodle Dandy"?

As an actor, composer, songwriter, and playwright, Cohan was the de facto mayor of Broadway in the early 20th century. He published more than 300 songs during his lengthy career, including staples like "You're a Grand Old Flag" and, fittingly, "Give My Regards to Broadway."

Asked by Beth Sederstrom · Last updated 5 years ago · 62.4K views · SOURCE