Justin Bieber and his wife Hailey cut casual figures as they step out for lunch together at Nobu in Malibu

They celebrated their friend Andrew Watt's birthday the night before.

Justin and Hailey Bieber opted for a more low-key afternoon on Sunday as the newlyweds dined at the popular Malibu restaurant Nobu.

The 25–year–singer and the 22–year–old model stuck to their standard laid-back street style for the intimate outing.

Date day: Justin Bieber, 25, and his wife Hailey, 22, opted for a low-key afternoon on Sunday

Date day: Justin Bieber, 25, and his wife Hailey, 22, opted for a low-key afternoon on Sunday

They sure like Japanese food: The newlyweds dined at the highly regarded Japanese restaurant Nobu in Malibu

They sure like Japanese food: The newlyweds dined at the highly regarded Japanese restaurant Nobu in Malibu

Carry your belongings in style like Hailey with a Prada belt bag

Hailey Bieber knows exactly how to nail off-duty style.

Over the weekend, she stepped out in a double-denim ensemble, completed with a chic belt bag by Prada, which we have to talk about!

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Hailey favored some throwback denim with a stylish denim jacket and matching high-waisted jeans.

She contrasted the blue articles with a simple black tank top that highlighted her fit arms.

The blonde beauty had her lustrous locks pulled back in a high ponytail, and she accessorized with a black hip bag with a studded strap slung over her shoulder.

She blocked out the piercing midday sun with a pair of classic black Ray Ban Wayfarers and had her nails painted a lovely shade of lavender.

Double denim: Hailey favored some throwback denim with a stylish denim jacket and matching high-waisted jeans

Double denim: Hailey favored some throwback denim with a stylish denim jacket and matching high-waisted jeans

Justin rocked an even more casual look with a canary yellow T-shirt.

The Sorry singer had his close-cropped hair hidden under a black baseball cap reading 'KING PALM' and featuring a golden crown logo. 

No fuss: Justin rocked an even more casual look with a canary yellow T-shirt. He wore a black cap advertising palm leaf cigar wrappers

No fuss: Justin rocked an even more casual look with a canary yellow T-shirt. He wore a black cap advertising palm leaf cigar wrappers

Hand in hand for the sunny day: The stars looked very happy and close

Hand in hand for the sunny day: The stars looked very happy and close 

Having a blast: Earlier on Saturday, Hailey shared a photo from the previous night to her Instagram Stories, when she attended the Halloween Horror Nights at Universal Studios Hollywood

Having a blast: Earlier on Saturday, Hailey shared a photo from the previous night to her Instagram Stories, when she attended the Halloween Horror Nights at Universal Studios Hollywood

Earlier on Saturday, Hailey shared a photo from the previous night to her Instagram Stories, when she attended the Halloween Horror Nights at Universal Studios Hollywood.

'Spooky season is the best season,' she captioned the photo, which showed her displaying her winning smile while wearing a backwards baseball cap and a black outfit with spaghetti straps with a drink in hand.

The late-night celebration must have tuckered out the model, who posted photos of her curled up and snoozing in the bag of the couple's forest green Mercedes.

Snoozing: The late-night celebration must have tuckered out the model, who posted photos of her curled up and snoozing in the bag of the couple's forest green Mercedes

Snoozing: The late-night celebration must have tuckered out the model, who posted photos of her curled up and snoozing in the bag of the couple's forest green Mercedes

Later on Saturday, she shared a playful photo of a jack-o'-lantern she'd carved featuring garish white teeth and a Los Angeles Lakers cap.

Her fearsome creation was joined by a googly eyed pumpkin carved by her friend, professional surfer Kelia Moniz.

The seasonal display came after Hailey posted a bizarre rant on Instagram about celebrating Halloween, which some of her more extreme evangelical followers considered a pagan holiday.

Spooky: Later on Saturday, she shared a playful photo of a jack-o'-lantern she'd carved featuring garish white teeth and a Los Angeles Lakers cap

Spooky: Later on Saturday, she shared a playful photo of a jack-o'-lantern she'd carved featuring garish white teeth and a Los Angeles Lakers cap

The runway star confirmed her Christian faith and said her religion has a history of remaking pagan holidays as explicitly Christian celebrations.

'Pagan Feast of Winter Solstice? Oh that’s now JESUS BIRTHDAY. Pagan Feast of Spring Planting? Oh that’s now EASTER WEEKEND. Pagan Celtic Festival involving dressing up and warding off evil spirits? 

'Oh now it’s All Saints Day and we celebrate the VICTORIOUS CHURCH THAT HAS OVERCOME THE BLOOD OF THE LAMB!!! CANDY PLEASE!!!'

'It's my party': The model has claimed that she has now 're-defined' Halloween as 'her own holiday' and will be 'claiming all candy for the glory of God and the celebration of the Saints'

'It's my party': The model has claimed that she has now 're-defined' Halloween as 'her own holiday' and will be 'claiming all candy for the glory of God and the celebration of the Saints'

Hailey and Justin both regularly attend Hillsong Church, either at its New York City or Los Angeles branches.

Though the church tries to appeal to young people, and boasts celebrity congregants like Chris Pratt, Selena Gomez, Vanessa Hudgens and Kylie and Kendall Jenner, it preaches a conservative form of evangelical Christianity.

The organization urged its Australian followers to vote against a measure legalizing gay marriage in 2017, and its global senior pastor wrote in a 2015 blog post that the church does not 'affirm' gay members of the church and doesn't allow members of the LGBTQ community to serve in leadership positions.

Justin Bieber and his wife Hailey cut casual figures as they step out for lunch together in LA

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