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Annette Charles, best known as rival dancer Cha Cha DiGregorio in the 1978 movie musical Grease, died Wednesday, according to Access Hollywood. She was 63.

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Charles, who had cancer, was hospitalized for pneumonia about a month ago, according to her mother, Mary Cardona.

Charles, who shared an extended dance sequence with John Travolta in Grease, went on to become a speech professor at California State University Northridge, in Northridge, Calif. Her other screen credits include appearances on The Bionic Woman, Magnum, P.I., The Incredible Hulk and The Flying Nun.

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Charles is the second Grease actor to pass away this year — Jeff Conaway, who played Kenickie, died at age 60 in May