Sitcom star Bonnie Franklin has been diagnosed with pancreatic cancer. The actress is best-known for the long-running series One Day at a Time, which aired from 1975-'84 and also starred Mackenzie Phillips and Valerie Bertinelli. Bonnie and Valerie reunited on Hot in Cleveland last year.
According to USA Today, the 68-year-old is undergoing treatment.
Mackenzie expressed her concern on Twitter, writing, "Sending out love and sweet prayers to my "mom". The incomparable Bonnie Franklin."
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