Reese Witherspoon: Monday Morning Workout & Office Visit!

Reese Witherspoon flashes a grin and holds onto her Gatorade water bottle while leaving the Burn 60 gym after a workout on Monday morning (July 1) in Brentwood, Calif.

The 37-year-old actress was later seen in some dressier clothes while stopping by an office building that afternoon.

PHOTOS: Check out the latest pics of Reese Witherspoon

Last week, Reese looked red hot while stopping by her office on Friday afternoon after tweeting about being obsessed with her new boots.

FYI: Reese is wearing an Alternative Apparel pullover.

15+ pictures inside of Reese Witherspoon at the gym and the office…