Making room for the cake! Reese Witherspoon kicks off 'birthday weekend' with a family hike ahead of her big 40th

She is gearing up for her milestone 40th birthday on Tuesday. 

And Reese Witherspoon did not view her upcoming celebrations as an excuse to slack on her workouts.

With mom Betty in town, the Legally Blonde star gathered her family for a day of hiking and dog walking in Los Angeles on Saturday.

No excuses! Reese Witherspoon gathered her family for a day of hiking in Los Angeles on Saturday

No excuses! Reese Witherspoon gathered her family for a day of hiking in Los Angeles on Saturday

The mother-of-three was modestly dressed in a grey T-shirt, which she wore with a pair of cropped leggings and multi-coloured trainers. 

Tied around her waist was a black hoodie, prepping her should a cool, California breeze swing by.

The actress completed her look with pair of mirrored shades and a trucker hat.

Simple style: The mother-of-three was modestly dressed in a grey T-shirt, which she wore with a pair of cropped leggings and multi-coloured trainers

Simple style: The mother-of-three was modestly dressed in a grey T-shirt, which she wore with a pair of cropped leggings and multi-coloured trainers

Family adventures: For the outing, Reese was joined by mother Betty, who was in town visiting the star for her birthday. Eldest child Ava Phillippe, 16, and youngest son Tennessee Toth, three, were also present

Family adventures: For the outing, Reese was joined by mother Betty, who was in town visiting the star for her birthday. Eldest child Ava Phillippe, 16, and youngest son Tennessee Toth, three, were also present

Liker mother, like daughter: Reese and her mother were similarly dressed, both clad in grey T-shirts, leggings, trainers and a waist-tied hoodie

Liker mother, like daughter: Reese and her mother were similarly dressed, both clad in grey T-shirts, leggings, trainers and a waist-tied hoodie

For the outing, Reese was joined by mother Betty, who was in town visiting the star for her birthday. 

Eldest child Ava Phillippe, 16, and youngest son Tennessee Toth, three, were also present.

Reese and her mother were similarly dressed, both clad in grey T-shirts, leggings, trainers and a waist-tied hoodie. 

The party has begun: Although her milestone 40th is Tuesday, the Draper James owner began her festivities on Saturday evening

The party has begun: Although her milestone 40th is Tuesday, the Draper James owner began her festivities on Saturday evening

Although her milestone 40th is Tuesday, the Draper James owner began her festivities on Saturday evening. 

The beautiful blonde, appearing to be on her way to an undisclosed location, shared a stunning selfie, clad in a sparkly shirt. 

'Happy Saturday y'all!! #BirthdayWeekend,' she wrote. 

Headed out for the evening: The beautiful blonde shared a stunning selfie, clad in a sparkly shirt

Headed out for the evening: The beautiful blonde shared a stunning selfie, clad in a sparkly shirt

Reese also share a hilarious video, courtesy of her Snapchat account, SnapsByReese. 

In the clip, the actress, joined by Betty in a backseat of a vehicle, asks her mother if she's 'gonna get crazy on the dance floor.'

Her mom, lips pursed as she shook her head up and down in agreement, simply answering, 'crazy.'

Reese then echoes her mom's statement, bobbing her side-to-side  while yelling, 'crazzzzzzy!'

Girls' night! In the clip, the actress, joined by Betty in a backseat of a vehicle, asks her mother if she's 'gonna get crazy on the dance floor'

Girls' night! In the clip, the actress, joined by Betty in a backseat of a vehicle, asks her mother if she's 'gonna get crazy on the dance floor'

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