VIDEO : The First ?Game Of Thrones? Prequel Star Announced

Game of Thrones is a worldwide sensation now, filled with instantly recognizable faces, but when the HBO series premiered in 2011, most of the cast were relative unknowns. The biggest names were probably Sean Bean and Peter Dinklage, but even then, it?s hard to imagine Dinklage starring in Avengers: Infinity War and My Dinner with Hervé without Tyrion on his filmography. Naomi Watts has been tapped to star in the still-untitled prequel series as a ?charismatic socialite hiding a dark secret,? according to The Hollywood Reporter.