The 20-year-old Disney Channel star died at his home in Los Angeles on Saturday, according to his spokesperson.
In a statement on Sunday, Boyce’s family said he had “passed away in his sleep due to a seizure that was a result of an ongoing medical condition for which he was being treated”.
On Tuesday night, the family told People in a new statement that Boyce’s “tragic passing was due to a seizure as a result of an ongoing medical condition, and that condition was epilepsy”.
The Los Angeles County Medical Examiner-Coroner announced on Monday that an autopsy had been performed, and that “a cause of death was deferred pending further investigation”.
The Independent has contacted the Examiner-Coroner’s office for comment.
Boyce was best known for his role as Carlos de Vil, the teenage son of Cruella de Vil in the Disney Channel franchise Descendants.
According to his bio on the Disney Channel, Boyce was born and raised in Los Angeles. He was a dancer who got his acting start in commercials, then television and film. Boyce starred alongside Adam Sandler in Grown Ups and Grown Ups 2, and his other film credits include Mirrors, Eagle Eye and the indie feature Runt. He also starred in the upcoming HBO series Mrs Fletcher.
Descendants 3 is scheduled for release in August.
His spokesperson said Sunday that Boyce was also a philanthropist who used his celebrity to advocate for those without a voice, including the homeless. Last year, he was honoured for his work with the Thirst Project, bringing awareness to the global water crisis and raising more than $30,000 for the organisation to build two wells in Eswatini, formerly known as Swaziland, in efforts to bring clean drinking water to the region.
In 2017, he received a Daytime Emmy Award with Disney XD for his participation in the series Timeless Heroes – Be Inspired, in honour of Black History Month. He appeared alongside his grandmother Jo Ann Boyce, one of 12 black teens known as the Clinton 12 who were the first to integrate into public school in Clinton, Tennessee, according to his Disney Channel biography.
A Disney Channel spokesperson released a statement on Sunday saying that from a young age, Boyce dreamed of sharing his artistic talents with the world and was fuelled by a desire to make a difference in peoples’ lives through his humanitarian work.
“He was an incredibly talented performer, a remarkably caring and thoughtful person and, above all else, he was a loving and dedicated son, brother, grandson and friend,” the statement said. “We offer our deepest condolences to his family, castmates and colleagues and join his many millions of fans in grieving his untimely passing. He will be dearly missed.”
Walt Disney Co Chairman and Chief Executive Robert Iger tweeted on Sunday: “The Walt Disney Company mourns the loss of #CameronBoyce, who was a friend to so many of us, and filled with so much talent, heart and life, and far too young to die. Our prayers go out to his family and his friends.”
Several of Boyce’s co-stars reacted to his death on social media Sunday.
Sandler tweeted : “Loved that kid. Cared so much about his family. Cared so much about the world. Thank you, Cameron, for all you gave to us. So much more was on the way. All our hearts are broken.”
Additional reporting by agencies