Peter Robbins, best known for voicing Peanuts character Charlie Brown, has died at the age of 65.
His family confirmed that the voice actor had taken his own life last week.
Robbins started voicing Charlie Brown at the age of nine in 1963 and went on to appear in several Peanuts cartoons.
His love for the role was so strong, that he had a picture of Charlie and his beloved dog Snoopy tattooed on his arm.
As well as lending his voice to famous cartoon, Robbins also appeared in episodes of The Munsters as Elmer.
Robbins, who suffered from bipolar disorder, had been troubled later in life.
He was sentenced to five years in prison in 2015 after making criminal threats against several people.
Robbins pleaded guilty to sending threatening letters to the media, offering money to have San Diego County Sheriff Bill Gore killed.
It was reported Robbins sent drawings and letters to the property manager and he even threatened other residents of the site.
The star was originally ordered probation while attending an in-house drug therapy, but was later sent to prison after violating his probation.
He was later released in 2019 - and turned his life around.
After being released, the actor was ordered not to drink or take drugs and had to take anger management classes.
Robbins began promoting getting "professional help" for mental health issues.
He was treated for his addictions to drugs, alcohol and sex.
Robbins was then released into a North County sober living home, where he started advocating about bipolar disorder, and advised people to take the illness "seriously".
He wrote: "I would recommend to anybody that has bipolar disorder to take it seriously because your life can turn around in the span of a month like it did to me. I came out of prison and I'm a better person for it. I'm much more humble and grateful and thankful that I lived through the experience."
Following his release from prison, Robbins got himself a new tattoo which was dedicated to "refurbishing my life".
Fans of the TV star paid tribute to him on Twitter, with many saying he "made the world brighter".
His family are devastated by their loss, and they will hold a memorial service for the star at a later date.
*If you're struggling and need to talk, the Samaritans operate a free helpline open 24/7 on 116 123. Alternatively, you can email jo@samaritans.org or visit their site to find your local branch
