Hollywood star Orlando Bloom's upcoming theatre stint should keep him grounded - the playwright has no idea who he is. The actor makes his West End theatre debut in London this summer (Jul07) in a revival of David Storey's 1969 play In Celebration. But despite garnering huge success on Disney franchise Pirates of the Caribbean, Bloom remains a relative unknown to literary heavyweight Storey. The 74-year-old says, "I didn't know that he was a big star. I had to be instructed. "When we met he was very charming - no side has developed which stars get when they've been hammered with success."