Australia's favourite celebs say 'Happy Birthday' to Play School.

Australia’s longest-running children’s series, Play School, is celebrating 50 years on air.

The ABC has made approximately 2250 episodes since it was first broadcast on July 18, 1966.

Generations of Australian children have grown up with the show and it’s famous presenters.

The broadcaster will present a variety of special events and content throughout the birthday month of July to celebrate.

“The ABC is extremely proud to celebrate the impressive milestone of 50 years of Play School and wishes congratulate everyone who has been involved in bringing the show into the homes of families around the country who have so warmly embraced it,” said Richard Finlayson, Director of ABC Television.

Play School holds a unique place in the hearts of generations of Australians and this is largely down to the fact that it strives to represent contemporary society so that children from across the community can see themselves as part of this special show.”

The ABC have taken a look back at the highlights and spoken to some of the stars that have made the show such a success.

Video courtesy of ABC. #PlaySchool50.

Play School airs at 6:00, 9:30, 12:30 and 15:30 weekdays and 9:30 and 15:30 on weekends on ABC KIDS and is available on ABC iview and ABC KIDS iview.