• 
  Patrick Albanesius

   Gary Grownup
• 
  Kira Cahill

   Mourning Widow
• 
  Natisha Anderson

   Greg's Mom
• 
  Nikki D'Amico

   Liza Minnelli
• 
  Luca Nicora

   King
• 
  Bodie Ohrmund

   Gary at 12
• 
  Jon Alexi

   Teenage Greg
• 
  Michelle Molbegott

   Liza Minnelli's Assistant (2017)

• 
  Julian Brandon Bereny

   Greg at 6
• 
  Andy Kenareki

   Shadowy Puppeteer
• 
  Ryan Alessi

   Daniel at 12
• 
  Dax Gregory Harasymowycz

   Gary at 6
• 
  Anton Van Leer Ascher

   The Boy in the Television
• 
  Matthew Payne

   Dead Man
• 
  Charlotte Pernicone

   Lucy

• 
  Isabella Bazler

   Ryan's friend (2017)
• 
  Briar Kirk

   Gary's schoolmate (2017)
• 
  Matthew Payne

  1 episode, 2017
• 
  Peter Xifo

  1 episode, 2017
• 
  Gregory S. Burkart

  1 episode, 2017
• 
  J.B. Waterman

  1 episode, 2017
• 
  Anton Van Leer Ascher

  1 episode, 2017