to tell you the truth
I’ll tell you the truth now.
I will always tell you the truth.
Apaga eso y te diré la verdad, ¿vale?
Turn that off and I'll tell you the truth, okay?
— Casi famosos (2000)
I'll tell you the truth.
Pero te diré la verdad porque creo que podría interesarte ¿Y eso por qué?
But I’ll tell you the truth because I think it might interest you. And why is that?
— Do You Thing (2001)