May 30 (UPI) — Oscar-winning actress Jamie Lee Curtis is mourning the death of her older sister, The Sentinel, Magic Sticks and The Devil’s Daughter star Kelly Lee Curtis.

“She passed away this morning. In her home. In nature. At peace. She was my first friend and lifelong confidant. She was jaw droppingly beautiful, and a talented actress. She played a mean game of hearts, collected turtles, loved her family, nature, music, thrifting, travel, Facebook, and Pokémon Go,” Jamie Lee, 67, wrote on social media Saturday.

“She was proud of her Danish roots and Hungarian Jewish ancestry and was a devoted American patriot. She will be remembered for her loving generosity, fierce opinions, endless curiosity, unique style, and her powdered, almond, crescent cookies at Christmas, hence her name, Auntie Cookie,” Jamie Lee added.

“Kelly always signed off any message or fare thee well with a Hungarian blessing… Isten Veled, God is with you. Isten Veled to my sister of the sun and the moon, my Tai. I’ll see you on down the line.”

The cause of her death has not been disclosed.

Kelly and Jamie Lee are the children of late screen legends Tony Curtis and Janet Leigh.