"Iron Man 2," the sequel starring Robert Downey Jr. as the gadget-happy billionaire superhero, earned $133.6 million domestically on its opening weekend, according to distributor Paramount Pictures' estimates Sunday. The opening rocketed past the original $98.6 million debut in 2008 and landed the record as the fifth-biggest opening weekend.
Set six months after the events in the first movie, "Iron Man 2" is said to explore how revealing his identity has affected Tony Stark, who takes to the bottle.