Complex sentence: Her father's eldest brother, Walter C. Kelly (1873--1939), was a vaudeville star whose nationally known act "The Virginia Judge" was filmed as a 1930 MGM short and a 1935 Paramount feature.
Split into simpler sentences: Her father's eldest brother, Walter C. Kelly (1873--1939), was a vaudeville star. His nationally known act "The Virginia Judge" was filmed as a 1930 MGM short and a 1935 Paramount feature.