Celebrity couples Selena Gomez and The Weeknd and Jennifer Lopez and Alex Rodriguez took their relationships to the next level as they made their red carpet debuts at Monday's (May 1) Met Gala in New York City.

Gomez and The Weeknd, who began dating in January, have most recently been spotted together at the music festival Coachella but this is the first time the showbiz pair have stepped out together at a high profile event.

Selena Gomez and The Weeknd look loved-up as they step out at the Met Gala

The It Ain't Me singer stunned in a silk Coach gown with a thigh-high slit, while Grammy-winning rapper The Weeknd kept it classic in a black tuxedo while attending the high-fashion event.

The Weeknd previously attended last year's Met Gala with his ex-girlfriend, model Bella Hadid, who was also at this year's ceremony.

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Singing superstar Jennifer Lopez and her boyfriend of three months Alex Rodriguez also made a big impact at event at the Metropolitan Museum of Art. 

Lopez snapped a selfie of the couple in their car on their way to the lavish party, captioning the picture: "Me and my macho bello".

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The Get Right singer wore a sheer turquoise Valentino gown for the event, while former baseball player Rodriguez looked dapper in a navy and black tux.

Jennifer Lopez and Alex Rodriguez step out at Met Gala

Model Kendall Jenner and rapper A$AP Rocky were also spotted cosying up together in Kylie Jenner's epic bathroom selfie which she posted on Instagram.

The reality TV star's sister Kim Kardashian also posted a sneaky photo of an intimate moment between the rumoured new couple on Snapchat.

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Meanwhile, Serena Williams showed off her burgeoning baby bump at the Met Gala alongside her fiance Alexis Ohanian. 

The tennis icon recently revealed that she was expecting her first baby with the Reddit co-founder by accidentally posting a picture of herself on Snapchat in a yellow swimsuit with a baby bump with the caption "20 weeks".

Fans the world over were bowled over when it was deducted that she had won the won the Australian Open in January - her 23rd grand slam singles title - in the first few weeks of her pregnancy.

Serena Williams and fiance Alexis Ohanian at the Met Gala

The 35-year-old tennis superstar cradled her baby bump while wearing a stunning emerald green halterneck dress with a plunging neckline.