They added he was being cared for at home by two hospice workers after having a tumour removed.
His death comes after Roy died aged 75 in May 2020 following a battle with coronavirus.
Siegfried said of his co-star’s death at the time: “Roy was a fighter his whole life including during these final days.
“I give my heartfelt appreciation to the team of doctors, nurses and staff at Mountain View Hospital who worked heroically against this insidious virus that ultimately took Roy’s life.”
