Eric RobertsIt's been two decades since Eric Roberts was a bigger star than his younger sister, but for the last two weeks, his movie 'The Expendables' has been No. 1 at the box office, while Julia's 'Eat Pray Love' has been No. 2 or No. 3.

Not that Eric sees it as a competition; he tells Moviefone he's proud of his sister and happy that both movies are doing well. Plus, his daughter Emma, 19, is in theaters now as well, with art-house entry 'Twelve.'

Still, the surprise success of 'The Expendables,' in which Roberts plays rogue CIA agent James Munroe, has returned the spotlight to Eric and the rest of the film's cast of veteran tough guy stars, from writer/director Sylvester Stallone to Roberts' longtime pal and three-time costar Mickey Rourke. During his acceptance speech at the Independent Spirit Awards last year, Rourke famously called Roberts the best actor he'd ever worked with and urged Hollywood to give Roberts the same kind of comeback Rourke had scored with 'The Wrestler.' After all, it's been a quarter of a century since Roberts landed his sole Oscar nomination to date, for 'Runaway Train.'

But maybe Roberts doesn't need a comeback, since he's never really been away. He's appeared in nearly 200 movies and TV series over the last 35 years (including a current guest stint on daytime's 'The Young and the Restless'). Still, as busy as he is, he took time to call Moviefone from his home in Los Angeles to talk about the success of 'The Expendables,' Stallone's plans for a follow-up, his own plans to reunite with Rourke for a sequel to their 1984 classic 'The Pope of Greenwich Village,' sharing the multiplex with his famous relatives, and what's behind his relentless work ethic.