Kristen Stewart: The Twilight Keystone

Kristen Stewart keeps her head down as she hops, skips and jumps to an awaiting SUV outside her parents home in Los Angeles on Saturday afternoon (December 12).

Despite the rain, the 19-year-old actress darted back inside her family home to get something she forgot before returning to the car.

Kristen‘s costar Kellan Lutz credits her and leading man Robert Pattinson for making Twilight as popular as it’s been.

Kellan shared with Zap2It, “The rest of us, we could suck probably. It’s Rob and Kristen who have the amazing chemistry. Without those two keystones, Twilight could have flopped.”

25+ pics inside of Kristen Stewart…