Ronni Kahn was born in Johannesburg, South Africa. She emigrated to Israel in 1970 and then to Australia in 1988. In 1994, she founded event-planning business Ronni Kahn Event Designs. In 2004, Kahn founded the food-rescue charity OzHarvest and was instrumental in changing legislation that had prevented potential food donors from donating their excess food. In 2010, Kahn was named Australia's Local Hero at the Australian of the Year Awards, and in 2012, she was awarded the Tribute Award for Innovation, Entrepreneurial Skill and Contribution to the Community at the Veuve Clicquot Business Woman Awards.