Australian actor and beloved Play School presenter Alister Smart has died aged 90 at his home in East Gippsland, Victoria.

Mr Smart died on September 9, but the news of his death has only recently become public.

Born in Adelaide on November 30, 1935, and raised in part around Nowra, Mr Smart left school and joined his family's piano restoration business.

He soon developed an interest in pianos which prompted him to study at Sydney's Conservatorium of Music.

He later turned to acting.

He started his career in theatre in the early 1950s and appeared in television productions in Australia and the UK from the 1950s until the mid-1990s.

His credits include Number 96, Skippy, The Sullivans, Sons and Daughters, A Country Practice and Neighbours.

Mr Smart featured on the very first episode of ABC's Play School which aired in 1966.

He would continue to appear as a presenter on Play School, now Australia's longest running children's show, for the next 27 years.