Tony Dow, the actor and director best known for playing the stalwart older brother Wally Cleaver to Jerry Mathers’ Beaver in the iconic series “Leave It to Beaver,” has died. He was 77.

His official Facebook page posted that he died Tuesday morning. “It is with an extremely heavy heart that we share with you the passing of our beloved Tony this morning. Tony was a beautiful soul – kind, compassionate, funny and humble,” read the message from his management team.

Dow and his wife Lauren announced in May that his cancer, which he had been diagnosed with years before, had returned.

Dow was born in Hollywood and his mother was an early stunt woman and double for Clara Bow. He was a Junior Olympics diving champion, but didn’t have much showbiz experience when he tagged along with a friend and ended up auditioning for and winning the role of Wally. “Leave it to Beaver” began airing in 1957 and ran until 1963. The popular black-and-white sitcom, centered around the typical idealized family of the time, followed the adventures of mischievous young Beaver, his practical brother Wally, their devious friend Eddie Haskell, and their long-suffering but understanding parents played by Barbara Billingsley and Hugh Beaumont.