VIDEO: Michael Keaton's Sister Gives Inside Look at His Family Life

Michael Keaton received a Golden Globe Award last night for Best Actor in a Musical or Comedy in BIRDMAN. During his emotional acceptance speech, the actor spoke fondly of his son, Sean Douglas, Keaton's child with his late wife, Caroline Williams.

Now Keaton's sister, Joyce Douglas, has revealed more about Keaton's family life in an interview with ET. See what she had to say below!

31-year-old Sean Douglas is well known in the music industry. He is a songwriter and producer who has been a part of such hit singles as"Heart Attack" by Demi Lovato, "Ghosttown" by Madonna, and the Jason Derulo singles "Wiggle" and "Talk Dirty." In addition, he has collaborated with such artists as Michael Bolton, David Guetta, Timbaland, The Backstreet Boys, Cobra Starship, Hilary Duff and Fifth Harmony.

After BIRDMAN, Keaton's upcoming projects include Spotlight and Minions. Among the actor's past film credits are Need For Speed, Robocop, Batman, Beetlejuice and more.