Sam Rockwell joins Indiana Jones for Cowboy Pic

Sam Rockwell – easily the best thing in it – is reuniting with his “Iron Man 2″ director Jon Favreau for “Cowboys and Aliens”, the quietly-confident western blockbuster that has already attracted the fine talents of Harrison Ford, Daniel Craig and “Tron 2″ babe Olivia Wilde.

In the flick, based on a comic about Cowboys & Indians teaming up to battle extra terrestrials, Rockwell will play ‘Doc’, a bar-owner who teams up with the film’s central characters to kick E.T’s ass.

The role, says THR, was initially intended for a fat-guy, but once Rockwell expressed interest, writers Alex Kurtzman, Roberto Orci and Damon Lindelof both thinned the part, physically-speaking, but fattened it in terms of screen-time.