Boston ? Patricia Kennedy Lawford, the sister of President John F. Kennedy and wife of actor Peter Lawford, died Sunday at her New York home of complications of pneumonia, according to a spokeswoman for Sen. Edward M. Kennedy. She was 82.

“My sister Pat is irreplaceable,” the Massachusetts Democrat said in a statement. “Everyone who knew Pat adored her. She was admired for her great style, for her love and support of the arts, her wit and generosity – and for the singular sense of wonder and joy she brought into our lives.”

Patricia Kennedy was the sixth child and fourth daughter of Rose and Joseph Kennedy’s nine children.

While always a tireless supporter of her brother’s political campaigns, she set her sights on Hollywood at a young age soon after her graduation from Rosemont College.

She met British actor Peter Lawford through her brother, the future president, in 1949. They were married in 1954 and had four children before divorcing in 1965.