The actor — who was best known for her role as Shirley Feeney in "Laverne & Shirley" — died of a brief illness at age 75 on 25 Jan., The Hollywood Reporter reported.
Her children, Zak and Emily Huudson, confirmed her death to the publication with a statement that read: "The passing of our kind, hilarious mother, Cindy Williams, has brought us insurmountable sadness that could never truly be expressed. Knowing and loving her has been our joy and privilege. She was one of a kind, beautiful, generous and possessed a brilliant sense of humour and a glittering spirit that everyone loved."