The Youngest Star?
This sounds like it was one of the tiniest actors at Santa Barbara's "Flying A." An actor's son made his film debut at a very young age. The baby, "Breezy Eason" "scored an 'emotional triumph.' He was playing the part of an infant, and at the right time injected the proper punch by yelling lustily. And he is only two months old." – Motography, January 30, 1915
The baby was so popular that "he has registered his antics in pictures at the rate of one film a week since he was born." – Reel Life, February 6, 1915