Forget Keeping Up With The Kardashians, Scott Disick is trying to keep up with his 20-year-old girlfriend.
The 38-year-old was caught partying into the wee hours of the morning during Amelia Gray Hamlin's birthday trip in Miami.
The KUWTK star looked exhausted when photographers spotted him arriving back at a Florida home for an after-party last week.
Amelia -- who is Real Housewives of Beverly Hills star Lisa Rinna and actor Harry Hamlin's youngest daughter -- was seen exiting their large SUV barefoot.
Wearing a stunning flesh-colored shirt and matching crop top, the model showcased her curves while celebrating her 20th birthday in the Sunshine State.
Scott kept it casual in all black and was photographed walking alongside an unidentified male with a stack of cash.
The couple reportedly showed up at the after-party at 7 AM before returning to their hotel more than one hour later at 8:30 AM.
Earlier in the night, Scott and Amelia ate dinner at Papi Steak restaurant. After their lavish meal, they hit up the city's two hottest nightclubs -- LIV and E11even.
Scott's late-night partying comes just days after Kourtney admitted his substance abuse issues was a "deal-breaker" for their relationship.
The duo -- who shares three kids -- dated for several years and their relationship woes due to Scott's excessive partying was chronicled in the first few seasons of KUWTK.
During part two of the reunion, which aired on Sunday, Kourtney got candid about the real reason why they are not together.
Sitting down with her sisters and Andy Cohen, Scott joined the famous family and was grilled about his substance abuse issues.
"Do you think your relationship might have turned out differently if you hadn't shared so much of it?" Cohen asked.
"Probably, but I think the substance abuse was the deal-breaker," Kourtney responded.
"I was pretty irresponsible," Scott chimed in.
Scott has gone to rehab more than once.
Following his breakup with Kourtney in 2015, he checked himself into rehab twice.
Scott also sought treatment again last year.