Disick is dating model Lina Sandberg, multiple sources tell PEOPLE. Disick's agent did not return requests for comment.
"They've been spending time together recently," one source says.
The romance comes after Disick, 32, and Kourtney Kardashian ended their nine-year relationship in June.
Kardashian, 36, has recently been romantically linked to Justin Bieber. A source previously told PEOPLE that the fling "upset" Disick, who shares children Mason, 6, Penelope, and Reign, 1, with Kardashian. (The 21-year-old pop star seems to have moved on to longtime pal Hailey Baldwin: On Sunday, he posted an Instagram of a passionate kiss with the model during their St. Barts vacation.)
VIDEO: Kourtney Kardashian Is Hooking Up with Justin Bieber, But 'It's Not Serious,' Source Says
Despite the ups and downs in 2015, Disick was invited to Kris Jenner's annual Christmas Eve party – though he rang in the New Year without his famous family, hosting a bash at Las Vegas' 1 OAK nightclub.
Sunday's episode of Keeping Up with the Kardashians showed Disick tearfully apologizing for his wild behavior.
"If I didn't have those kids, I would kill myself," he said. "But I have them and I'm going to be here and I'm going to make it right for them. I just hope that somehow … God can like, give me a chance or us a chance at this."