Scott Disick reportedly partied up a storm in Aspen, Colorado last weekend.

The 31-year-old reality TV star, whose long-term girlfriend Kourtney Kardashian recently gave birth to their third child, son Reign, has allegedly fallen off the wagon and started drinking again after seeking treatment in rehab last year.

A source claims the 'Keeping Up with the Kardashians' star and a group of friends ordered $840 worth of alcohol shortly after checking into the five-star Hotel Jerome and another $600 worth up to their room the following night.

The insider also told gossip website TMZ.com that one of Scott's friends jumped over a counter at the bar in the hotel's lobby and attempted to steal a bottle of alcohol, but was later charged $400.

Police weren't called to the scene at any point, but management sent staff up to the room after other guests complained about the smell of marijuana.

When the group checked out, staff found the non-smoking room littered with bottles and cigarette butts so they charged them an extra $500 for cleaning.

Scott previously admitted he thought he was going to die when he almost overdosed on alcohol and sleeping pills last June and Kourtney, 35, threatened to leave him unless he sought treatment in rehab.

She recently said on their show 'Kourtney & Khloé Take The Hamptons': ''You're either going to be away for a month - or be away from them [the children] forever.''