Actress Kelly Lee Curtis, known for “The Sentinel,”“Trading Places,” and other television and movie roles, died Saturday.

She was 69.

Jamie Lee Curtis mourned her big sister’s death on social media but did not name a cause.

“A warm aloha to my older sister, Kelly Lee Curtis,” Jamie Lee wrote. “She passed away this morning. In her home. In nature. At peace.”

Kelly Lee was the eldest daughter of Tony Curtis and Janet Leigh, born two years before Jamie Lee, who is 67. She died in Bellevue, Idaho, according to The Hollywood Reporter.

“She was my first friend and lifelong confidant,” Jamie Lee wrote. “She was jaw droppingly beautiful, and a talented actress.”

From playing “a mean game of hearts,” to collecting turtles, Kelly Lee loved nature, music, travel and Pokémon Go, among other things, including her family, Jamie Lee wrote. “She was proud of her Danish roots and Hungarian Jewish ancestry and was a devoted American patriot.”

The powdered almond crescent cookies she would make at Christmas earned her the moniker “Auntie Cookie,” Jamie Lee noted.

Kelly Lee was born in Santa Monica on June 17, 1956, and debuted onscreen a mere two years later in “The Vikings,” an adventure film starring her parents in which she had an uncredited role. In 1983 she had a role in “Trading Places” alongside Jamie Lee, and worked as her assistant in three movies after that.

She starred in two foreign films, the 1987 German comedy movie “Magic Sticks” and “The Devil’s Daughter,” a 1991 Italian horror film. Back Stateside, Kelly Lee played Lieutenant Carolyn Plummer in a recurring role during the first season of “The Sentinel” from 1996-99. She had guest spots on several series, including “The Equalizer” in 1986 and ’88, “Silk Stalkings,” “Star Trek: Deep Space Nine,” and “Judging Amy,” according to her IMDB profile. She also made documentaries.

Before turning to show biz, she was a stockbroker briefly after graduating from Skidmore College in Saratoga Springs, New York, with a business degree. A member of The Actors Studio, she began studying acting at the Lee Strasberg Theatre Institute and appeared on stage in 1982 in “Say Goodnight, Gracie.”

She also worked with her Oscar-nominated father, whose given name was Bernard Schwartz, to raise funds to restore the historic Dohàny Street Synagogue in Budapest, The Hollywood Reporter noted. They did this work through the Emanuel Foundation, named after Tony Curtis’s father, Emanuel Schwartz.

Besides being big sister to Jamie Lee, Kelly Lee headed a clan of six half-siblings— Alexandra and Allegra, whom their father shared with then-wife Christine Kaufmann, and Nicholas and Ben Curtis, his children with model Leslie Allen.

“Kelly always signed off any message or fare thee well with a Hungarian blessing,” Jamie Lee wrote in her tribute. “Isten Veled, God is with you.”

She felt moved to do the same.

“Isten Veled to my sister of the sun and the moon, my Tai,” Jamie Lee wrote. “I’ll see you on down the line.”

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