The 34-year-old actress was recently forced to pull out of her stage performance of the musical "Funny Girl" at London's Menier Chocolate Factory theatre after discovering her dad Colin is battling the disease, the same illness that killed her brother Julian 26 years ago, reported Female First.
The blonde beauty broke the heartbreaking revelation to her fans after she was slammed with backlash across social media for cancelling her performance at the last minute.
Taking to her Twitter account, Sheridan said, in a since deleted tweet, "If u just found out ur dad had cancer u would be such a heartless human. Take care love (sic).