Scott Disick and Amelia Hamlin.Photo: BACKGRID

Scott Disick and Amelia Gray Hamlin

Scott DisickandAmelia Hamlinare perfectly in sync, outfits and all.

On Wednesday, theKeeping Up with the Kardashiansstar, 37, and the model, 19, were spotted wearing matching looks while enjoying their ongoing vacation in Miami, Florida.

The couple’s latest outing comes after a source told PEOPLE that Disick — who shares three children with exKourtney Kardsahian— is “getting serious” with Hamlin. “He’s been telling friends how much she means to him and how into her he is,” said the source, adding that the couple doesn’t “feel” the 18-year age gap between them.

“She grew up in the industry and knows how all this works,” said the source about Hamlin, the youngest daughter of actor Harry Hamlin andReal Housewives of Beverly HillsstarLisa Rinna. “It’s a different type of maturity, andthey really don’t feel the age difference.”

Scott Disick and Amelia Hamlin.Joe Scarnici/Getty; Jean Baptiste Lacroix/Getty

Scott Disick, Amelia Hamlin

Disick and Hamlin have been spotted together several times since October, when theywalked arm-in-arm on the beachin Santa Barbara and were also seen leavingKendall Jenner’s controversial Halloween partytogether. Two months later, theytoured several spectacular homeslisted for sale in Los Angeles.

In February, the duo made their relationshipInstagram officialin honor of Valentine’s Day.

Disick shared a photo of the two at dinner, captioning the shot, “Why so serious.” In a second snap, which he captioned “Just kiddin,” the couple laughed at the camera as Disick rested his arm on Hamlin’s chair.

Later that month,Hamlin gushed about her reality star boyfriendwhen she posted two photos of them on herInstagram Story. “My dream man,” she captioned a shot of the two sitting at a table together. In another, Hamlin gave Disick an adoring look as he wrapped his arm around her waist.

source: people.com