Samuel L. Jackson is desperate for a cameo role in the new Indiana Jones movie - so he can stay ahead of Harrison Ford as the world's box office king. The Pulp Fiction star passed Ford as Hollywood's most successful actor after appearing in a string of blockbusters, but now he fears the aging icon will reclaim his crown when the fourth Jones movie is released.

Jackson felt sure he had the upper hand after movie mogul George Lucas told him he'd find him a role in the new Indiana Jones film - when the two worked on the final Star Wars saga together.

Jackson explains, "George said, `Well, if you wanna stay in front of Harrison then we've got to figure out a way to get you in Raiders (of The Lost Ark).' So now they're shooting Raiders and I've been calling him; he won't return my calls. Can you believe that? He's dogging me. All I want to do is run across screen, I don't have to say anything. I just wanna run through the movie, get my name in the credits, so I can stay in front of Harrison."

-Samuel L. Jackson Pictures