Actor Irwin Keyes has passed away at the age of 63. 

Keyes, who is best known for his roles in "The Jeffersons" and "The Flinstones in Viva Rock Vegas," died last Wednesday at his home in Playa Del Rey, Calif, Entertainment Weekly reported. The actor reportedly died of acromegaly, a rare pituitary gland disorder.

The actor's niece, Rene Galarza, announced his death in a post to his Facebook page.

"It's with deep sympathy that I'm writing this post. Early this morning my family was informed that our beloved uncle, brother, teammate and friend, Irwin Keyes, has had his last curtain call," she wrote. "He is now an angel for us all and will be watching down. Our family wishes to thank all of you who have been a part of his life. He will be missed very much."

Keyes, a New York City native, made his big screen debut in the 1979 film, "The Warriors," where he played a police officer. The actor has also appeared in "House of 1000 Corpses," "Dahmer vs. Gacy," "Intolerable Cruelty," "The Exterminator" and its sequel and the 2013 Web series "Dead Kansas."

His TV credits included "Police Squad," "Married... With Children" and "Growing Pains."

"People would look at him and be instantly afraid him and then they would meet him talk to him and instantly love him," Keyes Phil Brock told EW. "He would play villains, but he had the kindest heart of all."

Keyes is survived by his wife Tracy Fontaine.