Scott Disick has quit drinking.

The 31-year-old TV star is reportedly determined to stay sober to prove to girlfriend Kourtney Kardashian - who is pregnant with his third child - he is serious about their relationship and wants to get things back on track following a string of recent rows, TMZ reports.

Last month, the 'Keeping Up with the Kardashians' star - who has children Mason, four, and Penelope, two, with Scott - kicked Scott out of their Hamptons home because she was fed up of his hard-partying ways and it is reportedly his drinking that causes tension, rather than his hectic social life.

Insiders insist Kourtney, 35, doesn't mind Scott going to clubs as he makes a lot of money from public appearances and it is good for her family's business.

And evidence of the businessman's new leaf has already been seen; as he made an appearance at New Jersey nightspot Harrah's Pool After Dark at the weekend - for which he was paid around $50,000 - but didn't have a single drink, though he did smoke ''a bunch'' of cigarettes.

The news comes after it was revealed the couple - who have been together for eight years - have been having relationship counselling with Pastor Rich Wilkerson Jr., who officiated Kim Kardashian and Kanye West's wedding in Florence, Italy, in May.

A source said recently: ''Pastor Rich Wilkerson Jr. is actually counselling Kourtney and Scott over their relationship problems.''