How is “be all ears” used?

In The Dark Knight Rises (2012), one line is: “l'm all ears.”

Which movie is “be all ears” from?

The clip at the top of this page is from The Dark Knight Rises (2012).

Modismo

to be waiting with interest to hear what sb has to say

informal · Se oye en 22 películas

to be waiting with interest to hear what sb has to say
'Do you know what he said?''Go on — I'm all ears.'

Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición

l'm all ears.

En 8 películas · n.º 1