I mistook you for
I took you for a thief.
Je t'ai pris pour quelqu'un d'autre.
I mistook you for someone else.
Je t'ai pris pour Roy, la première fois que je t'ai vu.
I mistook you for Roy the first time I saw you.
I mistook you for someone else.
Je t'ai pris pour ton frère aîné.
I mistook you for your older brother.
I mistook you for one of them.
— Indiana Jones et la dernière croisade (1989)
I mistook you for a cop.
I mistook you for your brother.