Scott Disick, 34, allegedly 'hooking up' with 19-year-old star

Scott Disick reportedly has a new lady in his life.

The "Keeping Up WIth the Kardashians" bad boy is hooking up with Sofia Richie, an insider told Us Weekly this week.

SEE ALSO: Kim Kardashian shows off fit bikini bod while soaking up the sun in Malibu -- see the pic!

"Things became official over the past week while they were in New York City together," the source said of the pair.

"It's so weird," the insider continued. "Not just the age difference, but mostly the fact that Sofia had been a family friend for years, and was close to Kendall and Kylie."

Disick, 34, and Richie, 19, had been spotted interacting throughout the summer, beginning with some flirty-looking photos of them during the Cannes Film Festival in May. Though Richie denied romance rumors on Twitter by announcing that they're "just homies," they have also been caught FaceTiming, grabbing coffee and shopping together over the past several months.

The confirmation of their fling comes towards the end of a whirlwind year for Disick, who has been linked to more than a handful of women over the last nine months, including fellow 19-year-old Bella Thorne and stylist Chloe Bartoli.

In fact, Bartoli and Richie used to be close friends before Disick reportedly came between them. Us Weekly also reported this week that the former friends aren't speaking to one another and have unfollowed each other on Instagram.

"After Sofia started hooking up with Scott, Chloe stopped speaking to her," the source said. "It's a mess. They were the best of friends and were inseperable."

Bartoli and Disick go back at least a couple of years, too. It was the father-of-three's steamy poolside pictures with Bartoli that led to the end of his years-long relationship with Kardashian back in 2015.

Kardashian and Disick share Mason, 7, Penelope, 5, and Reign, 2, together. Though Kardashian has said on more than one occasion that she is done romantically with Disick for good, the pair is still amicable and routinely spends time together for the benefit of their children.

More from AOL.com:
Kylie Jenner goes bra-less in white bodysuit: See the racy Instagram snap
Jimmy Kimmel tears into Fox & Friends' Brian Kilmeade: 'You phony little creep'
'America’s Got Talent' season 12 finale crowns a winner