Archie Lyndhurst.Photo: Joe Maher/FilmMagic

The family ofArchie Lyndhurst,who was the star of CBBC seriesSo Awkwardand the son of English actor Nicholas Lyndhurst, has revealed his cause of death.
In an emotional Instagram post, his mother Lucy shared that her son died in his sleep aftersuffering a brain hemorrhage.
“On the 22nd September our world blew apart, the damage caused to it totally irreparable. Archie was, and always will remain our everything. Those of you who know us know the catastrophic effect it has had, and will have on us for the rest of our days. Archie was the most extraordinary magical human being we have ever met,” she wrote of her son, who died last year at the age of 19.
“As his parents we couldn’t be prouder of him for all he achieved in the short time he was given, and especially for the beautiful human being he was,” she continued.
Nicholas Lyndhurst and his son Archie Lyndhurst.Dave Benett/WireImage

Archie’s mother shared that the family received the results of their son’s second post-mortem shortly before Christmas.
According toMacmillan Cancer Support, acute lymphoblastic leukemia is “a rare cancer of the blood cells,” which “can cause symptoms very quickly.”
“Archie had numerous bleeds on the brain and the Dr went to great lengths to reassure us that he wouldn’t have been in any pain as it happened in his sleep. The results utterly floored us to think something like this could happen. It’s very rare and around only 800 people a year die from it,” she continued. “Only days before he’d been with thelove of his life Nethracelebrating his birthday early as she was due to go away with work commitments. Life is fragile, precious and sometimes incredibly cruel.”
In a separate post, sheadded, “Our darling boy, we love you forever and ever and thank you everyday, for every beautiful memory we have. We will celebrate you always. All our love.”
In addition to his work on CBBC’sSo Awkward, Lyndhurst also provided his voice to the video gameFinal Fantasy XIV: Heavenswardand played a younger version of Jack Whitehall’s character in the BBC comedyBad Education.
In a statement to PEOPLE at the time, Lyndhurst’s father Nicholas and his wife said, “Lucy and I are utterly grief stricken and respectfully request privacy.”
source: people.com