Justin, meanwhile, opted for tie-dye sweatpants and a baggy gray zip-up hoodie worn over a white T-shirt.

Last month in an interview with GQ Hype, the Rhode Skincare founder explained why she and her husband often dress drastically differently.

‘He may want to wear baggy sweats to dinner, and I might want to wear a tiny little dress just because that’s how I’m feeling,’ she told the publication.

On Sunday Hailey rounded out her timeless look with a pair of black patent leather flats.

Her glossy light brown bob haircut was parted down the center with the front pieces tucked behind her ears.

She accessorized with a pair of medium-sized gold hoop earrings and a matching necklace.

The style maven shielded her eyes with a pair of narrow, rectangular, black sunglasses.

The star flaunted a dark manicure and wore a light face of makeup.

For his part, Justin covered his ear-length hair with a white and blue trucker hat, and he wore white sneakers.

As they left a restaurant, Justin pulled the hood of his sweatshirt over his head and placed his hat on top of it.

At one point he shared a friendly hug with a buddy as they said goodbye and his wife walked ahead of him.

It comes after the Canadian wished Hailey a heartfelt happy birthday with a social media tribute.

‘Happy birthday baby. You make life wonderful,’ gushed the Baby hitmaker. ‘And I’m the lucky one that gets all of you.’

Along with the loving message, he shared a glimpse into one of their intimate moments as he posted a black and white clip showing him sweetly kissing Hailey’s face.

She also received a celebratory post from Kim Kardashian, whose sister Kendall Jenner is her close friend.