She's been Agatha all along, but Teen definitely hasn't been Billy all along. In "Agatha All Along" Episode 6, we learned exactly how long Wanda's son has been around in Eastview — and the answer is,

Locke is grateful he can finally talk about the real identity of his character on the Disney+ series and his possible future in the MCU.

Note: This article contains spoilers for Agatha All Along up through its sixth episode, “Familiar By Thy Side.”] Joe Locke sounds extremely relieved to be out from under at least some of his “don’t blab” duties on Disney+’s current Marvel series Agatha All Along.

We knew that Agatha All Along was stacked with a cast of queer icons, but now we officially have a canonical gay character. Episode 5 has confirmed long-standing fan theories about one character’s true identity,