se lo contaré

I'll tell it to him/her

→ se
phrase Uncommon #10,537
I'll tell it to him/her A future-tense phrase combining contaré, “I will tell,” with se, “to him/her/them,” and lo, “it” or “that.” The person being told is usually understood from context.
SP: Cuando vea a Ana, se lo contaré.
EN: When I see Ana, I'll tell it to her.

Se lo contaré todo a mi padre y a mi madre.

I’ll tell my father and mother everything.

Se lo contaré todo cuando lo vea hoy ¡Es una sorpresa!

I’ll tell him/her everything when I see him/her today. It’s a surprise!

— हम दिल दे चुके सनम (1999)

Se lo contaré después.

I'll tell him/her about it later.

Se lo contaré todo a tu esposa.

I'll tell your wife everything.

Vete a dormir, se lo contaré a mamá mañana.

Go to sleep, I'll tell Mom tomorrow.

— Estrellas en la Tierra (2007)

Se lo contaré a Bradley.

I'll tell Bradley.

— SEND HELP (Enviad ayuda) (2026)

Se lo contaré.

I'll tell him.

— Carandiru (2003)