About William Collier Jr.
William Collier Jr. was an American stage performer, producer, and a film actor who in the silent and sound eras was cast in no fewer than 89 motion pictures. Collier's acting experience in childhood, having first appeared on stage at age seven, helped him get his first movie role at age 14 in The Bugle Call (1916). When his parents divorced, his mother, the actress Paula Marr, remarried the actor William Collier Sr. who adopted Charles (the two did share a resemblance) and gave the boy the new name William Collier Jr.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.