I'm in a situation where I meet someone new, but who I already knew by someone telling me about her. So I guess it must be her, due to what she is telling me, but I'm not sure since I don't know her face. When she says her name, I want to respond with something like "Ah, that's what I thought! I've heard of you."
Can I say: "Je l'aurais pensé !" or should I use another tense? Or is it better to use "cru"? Or is there another expression which is more common and natural?