Last month,Elliotts performance earned him a Best Supporting Actor Academy Award nomination, his first ever.
But the actor admits that initial meeting was an odd one.
Id never met him before, Elliott tells EW.

Clay Enos/Warner Bros.
I remember him saying, This is going to sound a little weird, and it fingdidsound weird.
Because it sounded like me!
And hes been listening to my voice in interviews that Id done.
I hadnt seen the script.
I just had the conversation with Bradley and he talked about this brother relationship.
I mean, hes well-educated.
And as it turned out, hes a brilliant filmmaker.
It was 7:30 in the morning and Katharine calls up to me.
She said, Sam?
I said, Yeah?
You got the nomination!
I was like, Oh, cool!
Ive had a few awards come my way, but very few.
I just never really thought about that.
I just always felt lucky to get a job.
So when it came, I thought, What the f, man?