Kirsten Dunst: I Didn't Join Instagram!

Kirsten Dunst keeps herself hydrated with a bottle of water after breaking a sweat at the Tracy Anderson Studios on Tuesday (July 23) in Studio City, Calif.

Last week, the 31-year-old actress was spotted holding onto her beau Garrett Hedlund‘s arm while exiting Chateau Marmont in West Hollywood.

PHOTOS: Check out the latest pics of Kirsten Dunst

“I didn’t join Instagram, it’s a phony!” Kirsten recently tweeted.

In case you didn’t know, Kirsten‘s recent film Upside Down, also starring Jim Sturgess, is now available on DVD/Blu-ray!

10+ pictures inside of Kirsten Dunst drinking water after her workout…