The unexpected death of soap opera actor Billy Miller at the age of 43, just days before his 44th birthday, has sent shockwaves through the soap world. Co-stars, friends, and fans alike are grieving the loss of a talented actor known for his roles in "All My Children" and "The Young and the Restless."

Chrishell Stause, who worked alongside Billy on "All My Children," shared a heartfelt message on her Instagram Story, expressing her deep sadness and recounting the privilege of working with him and calling him a friend. She included a touching photo of Billy affectionately kissing her on the cheek.

Billy Miller initially rose to soap opera fame as Richie Novak in "All My Children" from 2007 to 2008. His stellar performances earned him three Daytime Emmy Awards, notably for his portrayal of Billy Abbott in "The Young and the Restless."

Billy's manager revealed that the actor was battling manic depression at the time of his passing, although the exact cause of death remains undisclosed.

Eileen Davidson, one of Billy's co-stars from "The Young and the Restless," expressed her sorrow on social media, highlighting his infectious charm and warm personality. Eric Braeden, known for his role as Victor Newman, paid tribute to Billy, praising his talent and kindness, and mentioned that he hoped Billy would reunite with the late Kristoff St. John in the "undiscovered country."

The loss of Billy Miller has left a void in the hearts of those who knew him, and his memory will endure through his remarkable contributions to the world of soap operas.