se lo va a creer

is going to believe it

→ se
phrase Rare #51,056
is going to believe it Used with a singular subject; the subject is often clear from context.
SP: Marta se lo va a creer cuando vea la foto.
EN: Marta is going to believe it when she sees the photo.

Tomás jamás se lo va a creer.

Tomás will never believe it.

Nadie se lo va a creer.

Nobody's going to believe it.

— Anatomía de una Caída (2023)

Tessa no se lo va a creer.

Tessa won't believe it.

— Depredador: Tierras salvajes (2025)

En la aldea no se lo va a creer nadie.

Nobody in the village is going to believe it.

— El señor de los anillos: Las dos torres (2002)