Transcript for Cameron Boyce's family share their story about his life and death
Now to the moving interview with the parents of young Disney star Cameron Boyce. The medical condition he suffered from that took his life in his sleep and the last time they saw him just hours before he passed. Here's robin and her interview. The night he passed away, we were out to dinner with him just hours before. And we were texting that night. We were texting back and forth up until 12:30 and somewhere between the last text he sent me and the morning, he was gone. Reporter: Just hours after these photos of a smiling Cameron Boyce were taken by his father, the 20-year-old was found unresponsive at his Los Angeles home. It's not cliche to say you never know. You never know. It's not cliche to say it. You know, I used to -- you know, when it's somebody else, you know, you always feel bad, but until you really -- it hits you, god, you just -- you just can't understand it. Reporter: Cameron passing away suddenly last month in his sleep due to I seizure which was a result of epilepsy, a neurological disorder that affects nearly 3.5 million Americans. Cameron had his first seizure at 16 1/2. And then until he had his second one, he wasn't considered as having epilepsy. And that was when he was 17, going on 18. He only ever had five seizures, and the fifth one is what -- is the one that he died from. Reporter: Was he receiving treatment? Yes. Yeah. Reporter: At just 12 years old, Cameron landed his breakout role on Disney channel's hit show "Jesse" going on to star in the wildly popular "Descendants" franchise, showcasing his many talents as an actor. It wasn't the right time, all right? Reporter: And dancer. He used to say to me, "Share your wisdom, mom. Share your wisdom with me," which -- Who says that? Who says that as a kid? And -- and I would. Reporter: Often described as an "Old soul," Cameron believed deeply in helping others. In your quiet moments, and you think of your son, what's the first thing that comes to mind? A month or so ago, he came to visit. And I was just so happy to see him. I gave him a big hug. And it was just cool that, you know, here's my now 20-year-old son, just drove up in his car from his house. And he's coming to visit me. And like, I'm thinking this is how it's going to be. It's going to be cool. And so, that's my -- that's my favorite memory right now because it was the last time I saw him just, like, being an adult and doing his thing. When he lived in New York for four months, and it was snowing out, and he just was -- dancing through it and he just did a pirouette that was perfect and it left a mark in the snow. I love that because it's him. It's the sunlight in shoes that he is. Reporter: Robin Roberts, ABC news, New York. And the parents telling robin they hope to carry out their son's legacy through the Cameron Boyce foundation raising on the issues important to him, epilepsy, ending gun violence and the clean water crisis.
This transcript has been automatically generated and may not be 100% accurate.