Reese Witherspoon: Aviator Nation Gym Stop!

Reese Witherspoon chats on the phone while filling up her gas tank on Thursday (March 14) in Brentwood, Calif.

Earlier in the day, the 36-year-old actress was all smiles while donning a colorful “Aviator Nation” sweater after her gym workout in Brentwood.

PHOTOS: Check out the latest pics of Reese Witherspoon

The day before, Reese was all dolled up while attending the 2013 25 Most Powerful Stylists Luncheon at an exclusive West Hollywood club.

FYI: Reese is wearing Westward \\ Leaning sunglasses and Hudson jeans.

15+ pictures inside of Reese Witherspoon chatting on her phone while stopping by a gas station in Brentwood…