"Oliver left us suddenly and I and his family and friends are in great grief", writes the actor's sister Josefine Loftéen to Aftonbladet.
Through "Bert" Loftéen became a famous name and he has told in interviews how he saw the back of success.
- It was a sensitive age.
It was not so easy to take all the shitty comments on the subway, he said in an interview with Aftonbladet in 1999.
During the filming of the series and the movie about "Bert", Oliver Loftéen and the main character Martin Andersson became friends privately and played in a punk and hardcore band together.
Then followed a short film career with attention to the role of prison inmate Andrej in "The Way Out".
Struggled with mental illness
The last film was "Sex, Hope & Love" from 2005.
According to the family, Oliver Loftéen struggled with mental illness.
According to the sister, shortly before his death, Loftéen was diagnosed with autism and Aspberger's syndrome.
He was also convicted a few years ago of assault for probation and psychiatric care.
In recent years, he had also served time in prison for assault and arson.
Oliver Loftéen turned 42 years old.