Sunny, a member of boy band U4, has died, a close friend said on Monday.
Naphat Ausawachanon, a fellow band member known as Nick U4, posted a short Facebook message announcing the death of Sunny at a condominium. The cause of the death was still unknown, he wrote initially.
But later he told reporters that Sunny had died of cancer and succumbed while being sent to a hospital for treatment on Monday.
A picture of Sunny U4 on the @sunny_u4 Twitter account in 2018.
U4 was a four-member band popular in the 1990s. It later disbanded.
Sunny, whose real name was Yanwarut Sutthawas, later underwent transgender surgery to become a woman.
Sunny claimed to have known her true gender while part of the boy band, but did not dare tell the fans.
