take the words out of (one's) mouth
To unknowingly say what someone else is thinking or about to say. You took the words right out of my mouth—I think she looks gorgeous, too!
take the words (right) out of somebody’s ˈmouth
say exactly what another person was going to say: ‘The speed limit on motorways should be raised.’ ‘I agree completely! You’ve taken the words right out of my mouth!’