Reese Witherspoon goes hiking with her three kids in Brentwood

Reese Witherspoon enjoyed some fresh air on Thursday alongside her three children 21-year-old Ava, Deacon, 17 and eight-year-old Tennessee.

The Oscar-winning actress- turning 45 next week – stayed close to her youngest, who was brimming with energy as he climbed up a tree stump.

While her little boy wore a pair of electric green shorts, the Big Little Lies star kept a low-profile in an all black outfit, a baseball cap and sunglasses. 

Hiking: Reese Witherspoon enjoyed some fresh air on Thursday alongside her three children 21-year-old Ava, Deacon, 17 and Tennessee, eight

She also kept her nose and mouth covered under a blue face mask amid the ongoing coronavirus pandemic, which has killed 22,689 in LA County. 

Both her eldest kids, who she shares with ex-husband Phillippe, also were vigilant about wearing face masks. 

Witherspoon’s daughter was her spitting image as she rocked an oversized Nirvana t-shirt, cropped workout pants and white sneakers. 

Family time: The Oscar-winning actress- turning 45 next week - stayed close to her youngest, who was brimming with energy as he climbed up a tree stump

Family time: The Oscar-winning actress- turning 45 next week – stayed close to her youngest, who was brimming with energy as he climbed up a tree stump

Doting mom: While her little boy wore electric green shorts, the Big Little Lies star kept a low-profile in an all black outfit, a baseball cap and sunglasses

Doting mom: While her little boy wore electric green shorts, the Big Little Lies star kept a low-profile in an all black outfit, a baseball cap and sunglasses

Staying safe: She also kept her nose and mouth covered under a blue face mask amid the ongoing coronavirus pandemic, which has killed 22,689 in LA County

Staying safe: She also kept her nose and mouth covered under a blue face mask amid the ongoing coronavirus pandemic, which has killed 22,689 in LA County

The college student, who attends UC Berkeley, was walking her rescue pup Benji, who she adopted from Best Friends Animal Society in October. 

Meanwhile, Deacon trailed right behind his sister with their family’s newest addition, a black Labrador named Major.  

Witherspoon brought Major home in January, three months after her beloved French bulldog Pepper passed away. 

Staying safe:u00A0She also kept her nose and mouth covered under a blue face mask amid the ongoing coronavirus pandemic, which has killed 22,689 in LA County

Staying safe: She also kept her nose and mouth covered under a blue face mask amid the ongoing coronavirus pandemic, which has killed 22,689 in LA County

Careful: Both her eldest kids, who she shares with ex-husband Phillippe, also were vigilant about wearing face masks

Careful: Both her eldest kids, who she shares with ex-husband Phillippe, also were vigilant about wearing face masks

Dog lovers: Witherspoon brought Major home in January, three months after her beloved French bulldog Pepper passed away

Dog lovers: Witherspoon brought Major home in January, three months after her beloved French bulldog Pepper passed away

Reese is regularly seen hiking in Los Angeles as well as encouraging her social media followers to participate in run/walk challenges. 

Earlier this week, she and her husband Jim Toth and their son hit a trail in Santa Monica with their dogs. 

Witherspoon and Toth – who met at a 2010 party – will celebrate their 10th wedding anniversary on March 26. 

Just like mom: Witherspoon's daughter was her spitting image as she rocked an oversized Nirvana t-shirt, cropped workout pants and white sneakers

Just like mom: Witherspoon’s daughter was her spitting image as she rocked an oversized Nirvana t-shirt, cropped workout pants and white sneakers

Fresh air: Witherspoon is regularly seen hiking with her kids

Fresh air: Witherspoon is regularly seen hiking with her kids

Since October, Witherspoon has been hard at work executive producing and reprising her role as reporter Bradley Jackson in the second season of Apple TV+ series The Morning Show. 

The ensemble newsroom drama also features Jennifer Aniston, Steve Carell, Billy Crudup, and Hasan Minhaj. 

The Legally Blonde alum will also reprise her role as pig mother-of-25 Rosita in Garth Jennings’ star-studded animated sequel Sing 2, which hits US/UK theaters December 22. 

Dog walks: Deacon trailed right behind his sister with their family's newest addition, a black Labrador named Major

Dog walks: Deacon trailed right behind his sister with their family’s newest addition, a black Labrador named Major

Fit as ever: The star regularly posts about running and walking

Healthy: Fitness is important to Witherspoon

In production: Since October, Witherspoon has been hard at work executive producing and reprising her role as reporter Bradley Jackson in the second season of Apple TV+ series The Morning Show

Staying busy: The Legally Blonde alum will also reprise her role as pig mother-of-25 Rosita in Garth Jennings' star-studded animated sequel Sing 2, which hits US/UK theaters December 22

Staying busy: The Legally Blonde alum will also reprise her role as pig mother-of-25 Rosita in Garth Jennings’ star-studded animated sequel Sing 2, which hits US/UK theaters December 22

After spending the day with her youngsters, the two-time Golden Globe winner shared a blast from the past on her Instagram. 

‘I bet you can guess who sold the most cookies for Troop 1077,’ the mom-of-three captioned a throwback photo from her Girl Scout days. 

In the adorable childhood snap, she can be seen in a green uniform and big smile across her face.   

Too cute: After spending the day with her youngsters, the two-time Golden Globe winner shared a blast from the past on her Instagram

Too cute: After spending the day with her youngsters, the two-time Golden Globe winner shared a blast from the past on her Instagram