Sofia Richie keeps it classic in a crisp white T-shirt during day of retail therapy

She was recently honored on social media by her older sister on the occasion of her birthday.

And Sofia Richie looked sublime and understated on Thursday, when she was spotted on a shopping excursion in Beverly Hills, California.

The model, who turned 23 years old on Tuesday, was casual in a crisp white tee shirt tucked into high-waisted gray denim jeans.

It’s her birthday week: Sofia Richie looked sublime and understated on Thursday, when she was spotted on a shopping excursion in Beverly Hills

The runway star’s pants ended high at her ankles, and she stepped into beige studded slide sandals.

Richie had an anklet on one foot.

Sofia carried a tan leather handle purse, and shielded her eyes from the sun with squared black frame sunglasses. 

Easy breezy: The model, who turned 23 years old on Tuesday, was casual in a crisp white tee shirt tucked into high-waisted gray denim jeans

Her blonde hair was parted at the middle, and pulled back.

She wore a silver wristwatch and a delicate bracelet on her other arm.

The beauty also sported a large and sturdy light blue face mask over her mouth and nose amid continued fears of the coronavirus pandemic and highly contagious Delta variant.

On her way: The runway star’s pants ended high at her ankles, and she stepped into beige studded slide sandals

Protected: The beauty also sported a large and sturdy light blue face mask over her mouth and nose amid continued fears of the coronavirus pandemic

On the occasion of her most recent trip around the sun, Sofia’s older sister Nicole Richie posted some incredible throwback pictures from when the starlet was very young to her Instagram.

She included sweet and heartfelt captions, including ‘Been loving you since day 1’ and ‘love you forever Sof’.

And on Sofia’s own feed this week, she shared a few snippets from her birthday festivities with friends.

On the occasion of her most recent trip around the sun: Sofia’s older sister Nicole Richie posted some incredible throwback pictures from when the starlet was very young

And on Sofia’s own feed this week: She shared a few snippets from her birthday festivities with some girlfriends

One image showed Sofia and three girlfriends wearing branded gray heather hoodie sweatshirts which proclaimed in yellow writing, ‘Sofia’s twenty three’.

The catwalker smiled slightly while wearing silly rounded pink sunglasses that said ‘happy birthday’ on them. 

Another image saw the media personality sitting in front of a gorgeous poolside vista complete with candles and greenery. 

Sitting pretty: Another image saw the media personality sitting in front of a gorgeous poolside vista

She lounged on a stone slab in a cream maxi dress and flip-flops. 

‘Special night’ she captioned the gallery of snaps, which also included a menu of signature cocktails for the party.

One was a vodka drink called ’23 reasons why’.

‘Special night’: She captioned the gallery of snaps, which also included a menu of signature cocktails for the party