The radio host was 82

Legendary radio host Casey Kasem, known for his American Top 40 (AT40) radio show for four decades, has died after a lengthy battle with Lewy body dementia, a degenerative condition similar to Parkinson’s disease.

Kasem’s daughter, Kerri Kasem, revealed early Sunday that her father passed on Father’s Day.

Kasem inspired many disc jockeys and radio hosts with his unique blend of trivia, dedications and his signature sign off, “Keep your feet on the ground and keep reaching for the stars” for decades.

Kasem was also the voice of Shaggy on Scooby-Doo and Robin on the Batman cartoon series for years.

Kasem was diagnosed with Parkinson’s in 2007 and later suffered from dementia and sepsis. After he was diagnosed, he signed a document giving his oldest children authority over his medical care, which later caused a major feud between Kasem’s adult children and his wife of 33 years.

On Wednesday, a judge gave Kerri Kasem authority to have doctors stop giving her father food, water and medicine citing his doctor. Kerri Kasem’s lawyer stated that his doctor concluded that continuing artificial nutrition and hydration would “at best prolong the dying process for him and will certainly add suffering to an already terribly uncomfortable dying process,”

Kasem was 82 years old.