Vanessa Hudgens's dad, Greg Hudgens, has passed away. The actress took to Twitter on Sunday to reveal the heartbreaking news, writing, "I am so sad to say that last night my daddy, Greg passed away from stage 4 cancer. Thank you to everyone who kept him in your prayers." Vanessa first revealed her father's illness [1] during a speech at the 2015 Industry Dance Awards and Cancer Benefit Show at the Avalon in Hollywood. "Let me tell you, I hate cancer," she said. "I hate cancer with every cell of my being." Vanessa also clarified on Twitter that she will still be performing in Sunday night's Grease: Live show on Fox in her dad's honor. Watch a sneak peek of the cast in action [2] ahead of tonight's show.

I am so sad to say that last night my daddy, Greg passed away from stage 4 cancer. Thank you to everyone who kept him in your prayers.

— Vanessa Hudgens (@VanessaHudgens) January 31, 2016 [3]

Tonight, I do the show in his honor.

— Vanessa Hudgens (@VanessaHudgens) January 31, 2016 [4]