Stylish couple: Justin Bieber, 27, looked dapper yet casual in a silky royal blue tuxedo while attending a wedding in LA on Sunday with his gorgeous wife Hailey Bieber

Justin appeared to be opting for a more casual look with his tie-free dress shirt left untucked.

He covered his shaggy hair with a flat-brimmed hat with colorful designs on the bottom of the brim, which made him look a bit like Owen Wilson’s character in The Royal Tenenbaums.

The Sorry singer rounded out the look with classic black leather shoes, and he sipped on a bottle of Health-Ade kombucha to stay hydrated throughout the evening.

Dressing down: Justin wore his shirt untucked with the blue tux and had on classic black leather shoes

Cooling down: He wore a flat-brimmed fedora and sipped on some kombucha to stay hydrated

Back in black: Hailey stunned in a classic sleeveless little black dress that showcased her toned arms and legs. She carried a slim black clutch and wore pointy black heels

Hailey left the colors to her husband and stuck to classic elegance with her tiny black dress.

The low-cut item featured thick shoulder straps while its lack of sleeves highlighted her trim arms.

The 5ft8in model stood tall in a set of pointy black heels that strapped around her ankles.

She wore her ombré blond locks parted down the middle and in thick curls resting on her shoulders, while she added some sparkle with multiple gold necklaces.

Posing: Earlier in the day, the couple showed off their looks at home from their porch before heading to the venue

Earlier in the day, the couple showed off their looks at home from their porch.

The lovebirds joined a crowd of friends at the ceremony when they posted some black-and-white photobooth-style snaps to Justin’s Instagram page.

Justin had on funny ice cream cone–shaped sunglasses, though everyone else was straitlaced.

‘Congrats @harv and @flelishafury excited to watch you guys continue to walk in your purpose,’ he captioned the pictures.

Pals: The lovebirds joined a crowd of friends at the ceremony when they posted some black-and-white photobooth-style snaps to Justin’s Instagram page

Old friend: They were celebrating the marriage of musician and producer Bernard ‘Harv’ Harvey, who played bass with him going back to 2010

Bernard ‘Harv’ Harvey is a musician and producer who’s association with Justin goes back more than a decade.

He started working for the Baby singer back in 2010 as his touring bassist, and Justin’s manager Scooter Braun later added him to his artist roster.

He produced three songs on the pop star’s critically dismissed 2020 album Changes: Available, At Least For Now and Forever.

He also produced the number one hit Peaches and the track Somebody on Bieber’s much-better received chart-topper Justice, which was released in March.

Moving on up: Justin’s manager Scooter Braun added Harv to his artist roster, and he went on to produce three songs on the critically reviled Changes album: Available, At Least For Now and Forever

Comeback: He also produced the number one hit Peaches and the track Somebody on Bieber’s much-better received chart-topper Justice, which was released in March

On Saturday night, Justin was occupied in Atlanta as he performed one of his highest-profile live gigs since the start of the coronavirus pandemic.

He was headlining an all-star lineup featuring Doja Cat, Saweetie, The Black Keys and Diplo’s side project Major Lazer.

The musicians were the appetizer before the main boxing matches, including a fight between YouTuber Jake Paul and former MMA fighter Ben Askren.

The fight ended up being over almost as soon as it began after Paul took out Askren with a knockout only two minutes into the first round.

Although the fallen fighter got back on his feet in time, the referee ended the bout because he was stumbling and seemingly disoriented.

Hailey also showed off some of her sizzling looks, including a mirrored mini skirt and a white crop top, while on her own in Atlanta.

Headliner: On Saturday night, Justin was occupied in Atlanta as he performed with Doja Cat and Saweetie for the Jake Paul boxing match

High fashion: Hailey also showed off some of her sizzling looks, including a mirrored mini skirt and a white crop top, while on her own in Atlanta