Rona was Prudence to Olivia's Mia
Sad to hear about the passing of Olivia Newton-John's older sister, Rona. who was recently diagnosed with brain cancer. Rona was a frequent guest star on television shows in the '60s and early '70s, then began a relationship with her sister's "Grease" costar Jeff Conaway after meeting at a party at producer Allan Carr's house in 1978. (She and Jeff were married from 1980-85.) She later remarried and started a family. RIP..
Olivia told People::
"Rona died of a very aggressive brain tumor and mercifully suffered no pain. She was surrounded by the love of her four children – Fiona, Brett, Tottie and Emerson, and her wonderful friends. I will miss her forever – my beautiful, smart, talented, funny, brave sister Rona."