Scott Disick and Kourtney Kardashian

Scott Disick and Kourtney Kardashian

Kourtney Kardashian still lights up Scott Disick's heart.

The 31-year-old star gushed about his girlfriend of eight years, who recently gave birth to their third child, and admitted he's still besotted with the 35-year-old beauty despite their differences.

In a deleted scene from the latest episode of their E! series, 'Kourtney & Khloé Take The Hamptons,' he said: "I'll say after all this time and all these years we've been together, she can still surprise me and still lighten up my day and my heart."

Scott opened up about his feelings for Kourtney after their close friend Paster Rich Wilkerson Jr., who presided over her sister Kim Kardashian West's nuptials to Kanye West in Florence, Italy last May, urged everyone around their dinner table to participate in "an honour circle" and share one nice thing about the reality TV star after Scott cracked a joke at her expense.

The couple, who have son Mason, five, and daughter Penelope, two, welcomed their second son, Reign Aston Disick into the world, on December 14 after a difficult few months, during which Kourtney banned Scott from their home after arguing over his constant partying.

Scott recently admitted he was convinced he was going to die when he nearly overdosed on alcohol and sleeping pills in June and Kourtney threatened to dump him unless he sought treatment in rehab.

She previously said on their show: "You're either going to be away for a month - or be away from them [the children] forever."