Article continues below advertisementDiane Keaton's recent death is reportedly a result of a years-long cancer battle.According to insiders, the actress faced basal and squamous cell carcinoma before passing away due to bacterial pneumonia at age 79 on Saturday, October 11.Article continues below advertisementSource: MEGADiane Keaton died at age 79.Keaton underwent procedures to remove lesions due to her cancer."She never wanted anyone's pity," a friend of the star told Rob Shuter's Substack. "Diane handled it with humor, grace, and total privacy.