Guests included politicians, News Corp executives, editors and journalists, plus senior business figures from around Australia.
The birthday event comes as the world reads about the secret court case impacting the future of News Corp and Fox.
Values that drove the newspaper at launch endure, but will it survive in print?
Sophie Raptis has been appointed general manager, Commercial for The Australian and Prestige Titles.
Jaimes Leggett said the platform "reflects News’ readiness to challenge the status quo, something that we see the business doing day-in-day-out."
"We reach more Australians than ever before, across more platforms than we ever thought possible in 1964."
"Through the incredible power of podcasting, we hope that we will make a profound difference."
The prize is open to all Australian writers, regardless of age.
The Daily Telegraph’s Mick Carroll the new chair of the News Corp Editorial Board
• Gunn’s promotion was announced to readers on Saturday
Editor Michelle Gunn: ‘Our most successful bundle is the weekend newspaper plus digital.’
The Australian launches subscriber benefits program