The 35-year-old reality star is currently romancing 19-year-old Sofia Richie, but after his ex-girlfriend Kourtney Kardashian - with whom he has Mason, eight, Penelope, six, and Reign, three - split with her partner Younes Bendjima, sources believe he could be looking to rekindle his old flame.
An insider said: ''[Scott would] get back together with Kourtney in a heartbeat. Sofia makes him happy but they are also very on and off. It wouldn't be surprising if Scott tried to pursue things again with Kourtney down the line.''
The 'Keeping Up with the Kardashians' star went back to his partying ways early last year before he met Sofia, and it's believed 39-year-old Kourtney's relationship with Younes contributed to Scott's behaviour.
The source added: ''Seeing Kourtney date Younes definitely played into his partying. He's never gotten over her and was really hoping to get her back when she first started dating Younes.''
But things might not turn out the way Scott wants, as Kourtney is reportedly ''happy being single'' for the time being.
A second source told People magazine: ''Kourtney is doing great. She isn't seeing Younes. After all the drama with Scott over the years, she wasn't going to put up with any drama from Younes. She cut him off. She is focused on her kids and herself. [She is] happy being single for now.''
Scott's dislike for Younes was well documented, as during one episode of their E! reality show, it was claimed he had ''screamed'' over the phone when he first learned of Kourtney's new romance.
On an episode which aired in October, Kourtney said: ''Last night I went to dinner with a guy and was photographed and I just felt like I should give Scott a heads up out of respect, even though he hasn't done the same to me in the past. But the photos never ended up coming out in the end so it was pretty much all for nothing.''
And sister Khloe, who had witnessed the phone call, added: ''He was screaming at the top of his lungs.''