I saw him.
I met him.
I struck up an acquaintance with him.
I became acquainted with him.
I met him.
I ran into him.
I have been to see him.
I came across him in a most unlikely place.
I saw him.
I have already seen him [have seen him already].
I'm [I got, I became] acquainted with him.
I met him by chance.
I interview him.
I saw him again.
I did his interview.