1992 – The soap opera One Life to Live airs the first openly gay teen character. Billy Douglas, a high school student, tells his best friend, Joey Buchanan, that he is gay.
Newcomer actor Ryan Phillippe played the role from April 1992 until May 1993.
The character is the first openly gay teenager featured in a television series, and Phillippe’s breakthrough role is considered groundbreaking in daytime television.
Source:
https://ronnisanlo.com/today-in-lgbt-history-june-18-3/