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Vanessa Hudgens, Greg Hudgens

Michael Simon/StarTraks

Vanessa Hudgens is mourning the loss of her father, hours before she is set to take the stage in an anticipated live musical production.

The 27-year-old High School Musical alum said on her Twitter page Sunday morning that her father, Greg Hudgens, has died after battling stage 4 cancer. He was 65 years old. Vanessa had revealed his ailment last August.

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

Vanessa made her sad announcement hours before FOX's Grease: Live musical special. The program airs at 7 p.m. ET.

Vanessa Hudgens, Dad

Instagram

Vanessa plays Rizzo in the production.

"Tonight, I do the show in his honor," she tweeted.

One more day to #GreaseLive. So excited for you guys to watch this! @gogrease

A photo posted by Vanessa Hudgens (@vanessahudgens) on

In addition to the actress, Greg is also survived by her mother and his wife Gina Hudgens and Vanessa's 20-year-old sister Stella Hudgens.

Several actors, including Vanessa's High School Musical co-star Ashley Tisdale, expressed their condolences on Twitter.

Empire actor Jussie Smollett's father died of cancer last year.

"Love2 @VanessaHudgens," the 32-year-old actor tweeted. "I know what losing a parent 2 cancer is.The fact ur performing 2night is a testament 2 ur strength. Shine on lovely 1."