He was confirmed dead by his wife, Jenny, who shared the news on Instagram
Scott Alexander appeared in Season 6 of America's Got Talent, where he made a woman appear out of nowhere and levitate on top of water.
He received a "yes" from all three judges and made it to the quarterfinals.
He also appeared in the second season of Penn & Teller: Fool Us.
Stuntman Jonathan Goodwin paid tribute to Alexander and called his death a "real loss".
Alexander is survived by his wife and three children.