The 26-year-old actress announced the sad news when accepting an award for Breakthrough Performer at the 2015 Industry Dance Awards in Los Angeles, reported Ace Showbiz.
"Last year, my boyfriend, Austin Butler, lost his mom, Lori, to cancer, and my dad has just been recently diagnosed with stage four cancer," she said onstage.
"Let me tell you, I hate cancer. I hate cancer with every cell of my being. This award, it means a lot to me but I dedicate it to my boyfriend's mom, Lori, my dad, and to all the families out there who are struggling with this, because it really takes a strong person and a strong family to be able to help those out who are going through this."
Last month, Hudgens asked fans to pray for her father while sharing a picture of her and her father on Instagram.
"My daddy and I Please pray for his healing!!! The more prayers the better," she captioned the photo.