The pair stunned in complementing black looks, and they were captured side-by-side at the event.
Brown later shared a photo of the pair from the event, and it has received a lot of attention, with over 3.5 million likes.
Bongiovi also shared a video clip of them being photographed at the event, which he accompanied with a trio of emojis, including a red heart.
Since then, the pair have been pictured out and about together a number of times. Most recently, they attended the Stranger Things season 4 premiere together (more on that below).
Who is Jake Bongiovi?
Bongiovi is the son of rockstar Jon Bon Jovi and his wife Dorothea Hurley, and is the second youngest of four children, with two brothers Romeo, 17 and Jesse, 27, and a sister Stephanie, 28.
Not just the son of a famous musician, he's academically-minded too, having been accepted into Syracuse University in NYC, with plans to gain a doctorate.
Jake Bongiovi, who doesn't intend on following in his dad's music-fuelled footsteps, is an activist too. When he was just 15, he put on a national student walkout while at Pennington School, in aid of highlighting the non-intervention regarding mass shootings in US schools. This came after 17 were killed in Parkland, Florida, in February 2018.
Here's everything you need to know about their relationship:
May 16, 2022: Millie Bobby Brown and Jake Bongiovi attend the Stranger Things season four premiere together
Brown and Bongiovi walked the red carpet together in Brooklyn on May 14, with her in a custom one-shoulder Louis Vuitton gown, shaped with a corset top and complete with a tulle trim.
Bongiovi looked smart in a black suit and white band collar shirt.
As the pair posed for photographers, they couldn't have seemed more smitten.
May 10, 2022: Millie Bobby Brown makes a heartfelt post about Jake Bongiovi on his birthday
Brown shared sweet photos of Bongiovi, along with a video of him, to mark his 20th birthday.
The first photo showed a joyful moment between the pair, with them jumping in the air on an idyllic beach, while another was of them snuggled up and Brown planting a kiss on Bongiovi's cheek as he pulled a goofy expression.
A video clip showed him hilariously playing with a glow-up sword in front of Brown's poodle.
The Enola Holmes star captioned the post: 'Happy birthday baby, can't wait to fly to the moon and back with you! (Schroobie noobie). [sic]'
It appears she has a nickname for Bongiovi - the cutest.
March 13, 2022: Millie Bobby Brown makes her BAFTAs debut in the company of Jake Bongiovi
Brown and Bongiovi made their red carpet debut at the 2022 BAFTAs, which also marked Brown's first ever appearance at the ceremony. They posed together in complementing black outfits - Brown in a gothic custom gown from Louis Vuitton's Spring 2022 runway, which came spliced with gauzy lace, and Bongiovi in dashing crisp tailoring, finished with a bow tie.
February 20, 2022: Millie Bobby Brown celebrated her 18th birthday with Jake Bongiovi
Brown celebrated her milestone birthday with Bongiovi and other friends, at which point the couple channelled Barbie and Ken in their fancy dress. Both Brown and Bongiovi emulated the iconic doll figures with platinum blonde hair, and the Enola Holmes star wore an embroidered Victorian-style dress from Annie’s Ibiza while Bongiovi donned a 70s-inspired shirt.
In keeping with the style of their outfits, Brown's caption reads: 'Hey Ken.'
Bongiovi commented: 'Ur rly pretty [sic].'
And the post has received attention from a host of celebrities, including Paris Hilton who wrote: 'Love it.'
Brown's Stranger Things co-star Noah Schnapp also shared snaps from her birthday celebrations, including a group shot which showed Brown and Bongiovi looking as smitten as ever.
December 25, 2021: Millie Bobby Brown spends Christmas with Jake Bongiovi
Brown gave fans a sneak peek into her Christmas with Bongiovi by way of a photo that she shared via her Instagram feed. The image showed the pair snuggled up in front of a brightly lit Christmas tree. Brown's accompanying caption simply reads: 'Happy holidays.'
The actor also revealed in an interview with Seventeen that she was gifted a vinyl Olivia Rodrigo's Sour album, which she has played on repeat.
She told the publication: 'I love "1 Step Forward 3 Steps Back." It makes me wanna cry every time.'
She added: 'I think my boyfriend's gonna kill me if I listen to it around him anymore.'
November 1, 2021: Millie Bobby Brown shares a blurry loved-up couple photo of her and Jake Bongiovi
Brown posted a photo to her Instagram feed of her and Bongiovi on the London Eye ferris wheel. The blurry photo shows them romantically hugging, with Brown wrapping her arms fully around Bongiovi's neck while he embraces her waist.
The photo seemingly suggested that the pair's relationship was blossoming.
On the same day, Bongiovi posted a photo of the pair to his own feed. The selfie, seemingly taken by Brown, showed them at a café, at which point they were dressed casually. Bongiovi's accompanying caption reads: 'We’re starting a band send name ideas.'
July 11, 2021: Millie Bobby Brown shared photos of her and Jake Bongiovi via her Instagram story
The photo shared by Brown, obtained by Just Jared, shows the pair posing with a sunset backdrop while snuggled up. As Brown wraps one arms around Bongiovi, he appears giddy, grinning from ear to ear.
Brown shared an accompanying gif that read: 'Happy weekend'.
June 17: Jake Bongiovi and Millie Bobby Brown hold hands in New York City.
Brown and Bongiovi were seen holding hands together while walking about in New York City. They were both dressed for balmy weather, with Bongiovi donning a palm-tree embroidered short-sleeved shirt and shorts and Brown in a plain top and flared skirt.
June 3, 2021: Jake Bongiovi shares a photo of him and Millie Bobby Brown together on Instagram, which first sparked dating rumours.
Bongiovi shared a photo of the pair in a car pulling goofy expressions. His caption simply reads: 'Bff <3,' and it has received sweet reactions from fans. One commenter wrote: 'Cuties,' and another echoed that sentiment with: 'Happy for you.'
Another person sweetly wrote: 'Happy for you.'
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