If you've heard the phrase "biggest star on the planet" in the past 9 months -- or if you hear it in the next year or so -- it's attached to Sam Worthington. Plain and simple.

In the April issue of Details magazine (on newsstands March 23), a new profile works to figure out the man who outshined Christian Bale in 'Terminator: Salvation,' who spearheaded the highest-grossing movie ever ('Avatar') and who'll clash with titans in, um, 'Clash of the Titans,' this April. Incorporating quotes from James Cameron, McG, Zoe Saldana and Worthington himself, the profile paints the Australian actor as a tireless, no-BS workhorse who stumbled into acting and never looked back.

Oh, and his favorite movie is 'Lethal Weapon 2.'