Jackie Coogan was a well-known child actor in the silent movie days of the 1920s, but continued his acting career into the 1980s. I remember him for his portrayal of the crazy 'Uncle Fester' on the 1960s tv bizarre comedy show "The Addams Family", which also starred Carolyn Jones and John Astin.
In 1980, I sent Mr. Coogan this photo of himself from the silent days, and he signed and returned it within a month, and included this additional composite postcard photo.
Jackie Coogan is responsible for the creation of the California Child Actor's Bill (also known as the Coogan Bill or Coogan Law). You can read about it here.