'Young and the Restless' Star Billy Miller's Cause of Death Confirmed

Billy Miller's family shed new light on his cause of death.

According to his grief-stricken mother, Patricia Miller, the soap opera star died by suicide.

“He fought a long, hard, valiant battle with bipolar depression for years. He did everything he could to control the disease,” Patricia shared in a statement shared by Soap Opera Digest.

"He loved his family, his friends and his fans but in the end the disease won the fight and he surrendered his life. The other causes of death being told are not true. I wish they were but they just aren’t," she said.

If you or someone you know is struggling or in crisis, help is available. Call or text 988 or chat 988lifeline.org.

It's unknown what preliminary reports Patricia was referencing, as she opted not to get into the details, going on instead to talk about her son's impact and the heartbreak of her devastating loss.

"We all loved him so much and are desperately trying to deal with our loss. I will have nothing further to say. Thanks for the love and support," she concluded.

The soap opera veteran, who earned three Daytime Emmys for his role as Billy Abbott on The Young and the Restlesspassed away on Friday, Sept. 15, in Austin, Texas, just two days before what would have been his 44th birthday.

His death was first announced in a statement by journalist Michael Fairman and was later confirmed by a family member.

>>> Sign up for Parade's Trending News newsletter and we'll keep you in the know on the viral pop culture moments and celebrity news everyone is talking about <<<

Over the course of his successful 16-year-long career on TV, Miller became a well-known soap star.

In 2006, he secured his first TV screen role playing Will Graham in CSI: NY. He later went on to portray Richie Novak in All My Children (2007-2008) before securing his breakout role on The Young and the Restless (2008-2014), for which he earned three Daytime Emmys: two for Outstanding Supporting Actor in a Drama Series and one for Outstanding Lead Actor in a Drama Series. He also portrayed John Delario on The CW's short-lived series Ringer.

He followed up his 719-episode run on The Young and the Restless by joining the cast of General Hospital–where he portrayed three characters (Drew Cain, Jason Morgan and Jake Doe) across 519 episodes. He also guest starred on NCIS, Suits, CSI, Ray Donovan and Truth Be Told and appeared in the movies American Sniper (2014), Fatal Honeymoon (2012) and Bad Blood (2015).

Next: Hollywood Remembers Soap Star Billy Miller After His Death