Jennifer Lopez, 54, is showing off her new fiance… and you better sit down, because you might recognize him!

Jennifer Lopez flashed a massive diamond ring while leaving her lavish new $21 million mansion in Hidden Hills on Saturday.

The Love Don’t Cost a Thing hitmaker, 55, was pictured in the passenger seat of her Cadillac Escalade after visiting her new home.

The superstar sported a cozy white sweater with a floral design, and a stunning diamond sparkler on the ring finger of her right hand, after finalizing her divorce from Ben Affleck, 52.

The mom-of-two accessorized with her signature hoop earrings and wore her brunette tresses down.

She also took to her Instagram on Saturday to celebrate the 17th birthday of her twins, Emme and Max, whom she shares with her third ex-husband Marc Anthony, 56.

‘Seventeen. I love you beyond forever,’ the doting mom wrote underneath a video montage of her children, adding two coconut emojis, in a nod to the nickname she calls them.

Among the photos and clips in the montage were some snaps from the twins’ celebration on Saturday.

Lopez was pictured standing with her arms around her kids in front of a lavish blue game show style birthday cake, which had Max’s name on it.

In another snap she was seen hugging Emme in front of a more simple white cake, topped with strawberries and gold candles that spelled out ‘happy birthday.’

The hitmaker had her sweater tucked into a pair of light blue jeans as she celebrated with Max and Emme.

The clip started out with a black and white photo of the star and her newborns. It then transitioned to a clip of Lopez and her kids on a tire swing.

Another image showed a younger Emme twirling around in a white tutu. One more recent snap of the twins saw them holding red Lego roses.

There was also a snap that showed the Hustlers star cuddled up to Max as he enjoyed some snacks from a charcuterie board.

Another saw Emme rocking a violet skirt. Max was also seen playing with a puppy in yet another cute photograph.

Lopez went on to share a number of candid snaps of her and the kids over the years as they cooked together, went on vacation, and performed on stage with their famous mom.

The video was set to Miley Cyrus’ song, Edge of Midnight, which is a mashup of her 2020 single Midnight Sky and Stevie Nicks’s iconic 1981 song Edge of Seventeen.

Lopez and Anthony were married from 2004 until 2014.

The singer has settled into the exclusive Hidden Hills neighborhood, according to TMZ.

This comes as her ex Affleck has already found his own bachelor retreat in Brentwood.

The sprawling 2.5-acre estate features a 10,046-square-foot main house, along with a barn, stables, a riding arena, a guest house, and a pool. For added luxury, the home boasts a private theater, a chef’s kitchen, and a fully equipped gym.

The property also has a touch of Hollywood history, having once been owned by John Fogerty of Creedence Clearwater Revival, who purchased it from Sylvester Stallone before selling it to Lopez.

Meanwhile, Lopez and Affleck are still struggling to sell their $61 million Beverly Hills mansion, which they purchased in May 2023.

Initially attempting an off-market sale, they later publicly listed the 38,000-square-foot mansion for $68 million in July.

Known as Crestview Manor, the lavish estate includes a 12-bedroom, 24-bathroom main house, a 5,000-square-foot guest penthouse, a two-bedroom guardhouse, a caretaker’s house, and a 12-car garage.

The property also boasts a home bar, gym, sports lounge, boxing ring, basketball and pickleball courts, and parking for up to 80 vehicles.

The former couple accepted a $64 million offer from a New Jersey buyer, but the deal fell through in September, leaving the mansion back on the market as of December 5.

TMZ reported that while the buyers remain ‘interested,’ the home remains unsold.

A source told PEOPLE that Lopez and Affleck weren’t fully aligned when they bought the house.

‘The $68 million mansion was Ben’s idea and a major compromise for her,’ the insider revealed, noting that its expansive layout was ideal for their blended family.

However, Lopez reportedly preferred a more romantic, European-inspired aesthetic, while Affleck soon found the home’s location inconvenient for his Brentwood-based life and children.

After months of speculation about their crumbling marriage, Lopez filed for divorce in August, citing April 26, 2024, as their date of separation.

Affleck moved into a $20 million Brentwood home in September, placing him closer to his ex-wife, Jennifer Garner, and their three children.

Lopez and Affleck’s rekindled romance, which began in 2021 after 17 years apart, saw them wed in a whirlwind Las Vegas ceremony in July 2022, followed by a star-studded celebration at Affleck’s Georgia estate.

Now, as they navigate their split, both are charting their own paths—one lavish real estate deal at a time.