He was best known for his role as the series' character Harold Smith.
The actor’s agent confirmed the news on Friday.
No cause of death was given.
Lenny Von Dohlen in ‘Twin Peaks’.Showtime
His sister Catherine Von Dohlen first shared the news with adedication to him on Facebookon Thursday.
“Brother Len was passionate about everything and everyone.
He loved a good laugh.
Alberto E. Rodriguez/Getty Images
He continues on his spiritual journey.
Living life full in his memory.”
Von Dohlen was part of the original cast ofTwin Peaks,which debuted in 1990 togreat fanfare.
He also appeared in the prequel filmTwin Peaks: Fire Walk With Me.
