Pregnant Katherine Schwarzenegger shares a laugh with sister Christina while out in Pacific Palisades

Katherine Schwarzenegger got fresh air with her younger sister Christina Schwarzenegger on Monday.

The sibling duo, 32 and 30, matched each other in black leggings, fleece jackets, and baseball caps.

Katherine, who's expecting her second child with husband Chris Pratt had a huge smile on her face as she walked through LA's Pacific Palisades neighborhood. 

Sister outing: Katherine Schwarzenegger got fresh air with her younger sister Christina Schwarzenegger on Monday

Sister outing: Katherine Schwarzenegger got fresh air with her younger sister Christina Schwarzenegger on Monday

The soon-to-be mother-of-two covered up in a button-up navy fleece jacket that had two front pockets.

She looked cozy in a pair of maternity leggings that stretched over her growing baby bump. 

She wore a black, cropped t-shirt and left her outer layer unfastened, putting her burgeoning belly on display as the center piece.

She wore a pair of crisp white sneakers and carried a pink and blue reusable bottle in one hand. 

Similar style: The sibling duo, 32 and 30, matched each other in black leggings, fleece jackets, and baseball caps.

Similar style: The sibling duo, 32 and 30, matched each other in black leggings, fleece jackets, and baseball caps.

She shielded her eyes in a pair of dark sunglasses and let her lustrous blonde highlighted locks stream out from under her hat.

The lengthy strands were curled in soft spirals that flowed neatly down her back during the sister outing.

Christina also kept warm in a light grey pullover fleece that had a center pocket pouch and a zipper.

She topped the look with a baby blue hat and also wore an oversized pair of black shades.

She wore a pair of black Asics sneakers with a white sole. 

Bumping along: Katherine, who's expecting her second child with husband Chris Pratt had a huge smile on her face as she walked through LA's Pasadena neighborhood

Bumping along: Katherine, who's expecting her second child with husband Chris Pratt had a huge smile on her face as she walked through LA's Pasadena neighborhood

On Mother's Day the author took to Instagram to share a carousel of images featuring her mother Maria Shriver.

The expectant mom wrote in the caption to her one million followers, 'The queen mother @mariashriver! 

Happy Mother’s Day to you! You are the goal mother, beyond inspirational in every way you mother your kids and how you grandmother Lyla Maria!'

She was referring to her one-year-old daughter, who she and her husband welcomed in 2020. 

Sweet post: On Mother's Day the author took to Instagram to share a carousel of images featuring her mother Maria Shriver

Sweet post: On Mother's Day the author took to Instagram to share a carousel of images featuring her mother Maria Shriver

She continued to gush over her mom as she added, 'You are the most loving, fun, caring, adventurous, welcoming, accepting and incredibly mothering at all times human on this planet.

'You have made us all feel seen, heard and loved on a daily basis! (Even kids that aren’t your blood kids feel this from you!)' she wrote in the heartfelt caption.

Then Katherine pointed back to her relationship with Lyla as she noted, 'Watching you grandmother is a huge thrill and seeing your love for Lyla makes my heart swell!'

Lovebirds: Katherine and Chris wed in 2019 and welcomed a daughter in 2020

Lovebirds: Katherine and Chris wed in 2019 and welcomed a daughter in 2020

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Pregnant Katherine Schwarzenegger shares a laugh with sister Christina while in Pacific Palisades

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