Two film legends are teaming up on the big screen.

Robert De Niro and Al Pacino star in Righteous Kill - which is out today.

It's their first film together since 1995's Heat.

They play a couple of cops on the verge of retirement, who have to go on the hunt for a serial killer.

The film also stars rapper Fifty Cent.

And Robert admits there was an embarrassing moment when he was told who his co-star was.