By Brandi Fowler
Updated: Aug 29, 2016 @ 7:15 pm

In an Instagram post Monday morning, Reese Witherspoon shared a photo of a room that was all but empty, save for the family dog staring back at her. She captioned the shot, "That feeling when all the kids go back to school... Now what? #AmIRight #BackToSchool." Perhaps that answer was hit the gym.

That feeling when all the kids go back to school...😳 Now what? #AmIRight #BackToSchool

A photo posted by Reese Witherspoon (@reesewitherspoon) on

The 40-year-old mom of two was spotted leaving a workout in Los Angeles Monday in a gray tank emblazoned with "Soul Searcher," paired with cropped black leggings and tennis shoes as she made her way with water bottle in hand (at top). Witherspoon completed her athletic look with mirrored shades and her hair pulled back in a ponytail.

RELATED: Reese Witherspoon Channels Her Inner Gwyneth Paltrow in Funny Instagram: It's All Easy

If you haven't noticed, the Hot Pursuit actress has a thing for her 'Soul Searcher' workout tops. Back in June she rocked a bright pink Spiritual Gangster 'Soul Searcher' tank, with black cropped leggings and matching gray-and-pink tennis shoes.

Bauer-Griffin/GC Images

Her workout gear aside, the Oscar winner was beaming as she stepped out in Los Angeles (above) before her children Ava, 16, and Deacon, 12, headed off to school. The mom of three wore a navy-and-pink floral printed blouse, a navy skirt and matching pink pumps (dare we say she channeled Elle Woods?). As she enjoyed the sunny day in Los Angeles, Witherspoon shielded her eyes with black cat-rimmed sunglasses, toted a brown-and-tan handbag, and also held a cookbook in place under her arm.

While it doesn't look as though the cookbook she toted was Gwyneth Paltrow's It's All Easy, the actress has already made it clear she's in the market for new recipes. Just a few days ago, she shared a photo of herself holding up Paltrow's cookbook in her kitchen with the caption, "Trying my best, @gwynethpaltrow, to make it look like #ItsAllEasy!!! #WishMeLuck"

Trying my best, @gwynethpaltrow, to make it look like #ItsAllEasy!!! #WishMeLuck 😉🍴

A photo posted by Reese Witherspoon (@reesewitherspoon) on

When it comes to making a stylish switch from athleisure wear to summery street looks, Witherspoon certainly does just that.