Katherine Schwarzenegger and her sister Christina enjoy a relaxing day

Katherine Schwarzenegger and her sister Christina enjoy a relaxing day of shopping in LA as twins in denim jeans

Katherine Schwarzenegger and her younger sister Christina treated themselves to a day of shopping in the Pacific Palisades neighborhood of Los Angeles on Thursday.

The 33-year-old media personality, who recently enjoyed a family outing with husband Chris Pratt and daughter Eloise, went stylishly casual for the quick outing with her 32-year-old sibling and producer.

The author dressed casually wearing classic denim blue jeans and a simple black sweatshirt.

In the warmer temperatures, she rolled up her sleeves to her elbows and slipped on a pair of open-toed sandals to keep herself comfortable on the walk.

The mother of two slung a cream-colored crossbody bag over her shoulder.

sisters day!  Katherine Schwarzenegger, 33, and her younger sister Christina, 32, treated themselves to a relaxing day of shopping in Los Angeles on Thursday

sisters day! Katherine Schwarzenegger, 33, and her younger sister Christina, 32, treated themselves to a relaxing day of shopping in Los Angeles on Thursday

Katherine accessorized her outfit with a selection of dainty necklaces as well as a pair of dangling earrings.

Her tresses were parted in the middle and flowed naturally in light waves over her shoulders.

She wore black sunglasses on her head, which she later put on to protect her eyes from the bright sunshine.

She was seen carrying a white shopping bag in her right hand while having a lighthearted conversation with her sister.

Christina also wore light blue jeans and a simple white shirt. She paired the ensemble with a cream-colored knit sweater, which she let partially fall over one of her shoulders.

The producer slipped on a pair of open-toe black sandals and donned a white hat that partially covered her tresses.

She slung a large handbag over her right shoulder and was seen sipping on a refreshing canned drink during her stroll.

Katherine and Christina are the daughters of Arnold Schwarzenegger and his ex-wife Maria Shriver and have two brothers: Patrick, 29, and Christopher, 25, and half-brother Joseph Baena, 25.

Stay casual: The author dressed casually, wearing classic denim blue jeans and a simple black sweatshirt

Stay casual: The author dressed casually, wearing classic denim blue jeans and a simple black sweatshirt

Close Bond: Katherine and Christina share a close bond, and the author released a children's book based on their relationship called

Close Bond: Katherine and Christina share a close bond, and the author released a children’s book based on their relationship called “Goodnight, Sister” in early February this year

Katherine and Christina share a close bond, and the author released a children’s book based on their relationship called Goodnight Sister in early February this year.

During an interview with Today to promote the book, the mother of two spoke about her bond with her younger sister.

She revealed that she first started writing “Good Night, Sister” after her three-year-old daughter Lyla was born. “It really came to mind because I read so many of the same books that Christina and I read when we were little.”

“And I had all these moments of flashbacks to our own childhoods and thinking about how much we did together, and I wanted to do this book about sisters to celebrate the relationship that Christina and I had growing up and that we so love.’ Lucky to have today.’

“We’re so similar in age – we’ve done everything together – so I wanted to write a children’s book that celebrated the relationship between sisters,” she added to Today.

Although she is close to all of her siblings, Katherine admitted that her sisterly bond with Christina is unwavering and revealed that the couple FaceTime almost daily. “It’s a problem,” she said jokingly.

1694148142 3 Katherine Schwarzenegger and her sister Christina enjoy a relaxing day

“Tribute: We’re so close in age – we’ve done everything together – so I wanted to write a children’s book that celebrated the relationship between sisters,” she added to Today

Family: Katherine has daughters Lyla, three, and Eloise, one, with husband Chris Pratt and gushed to People about the sisterly bond they've also developed

Family: Katherine has daughters Lyla, three, and Eloise, one, with husband Chris Pratt and gushed to People about the sisterly bond they’ve also developed

While the star also spoke to People about the book and her relationship with Christina, he added, “I just value her presence in my life and in my two daughters’ lives so much that this book is a nice little tribute to that .”

Katherine has daughters Lyla, three, and Eloise, one, with husband Chris Pratt and raves about the sisterly bond they have also developed.

“It’s really interesting because obviously I’m a year and a half older than Christina, so I don’t immediately remember everything about when she came home from the hospital and our dynamic,” she explained.

“But my parents say it’s very similar to the dynamic between Lyla and Eloise.”