Kourtney Kardashian and Scott Disick proved that they have no hard feelings after their split.

On Sunday, the "Keeping Up With the Kardashians" star reunited with Disick for a lunch date with their three children and his girlfriend, Sofia Richie. Kourtney, 39, was photographed with Disick, their kids Mason, 10, Penelope, 6, and Reign, 4, at a restaurant in Santa Barbara, California, Daily Mail reported.

For the outing, Kourtney went for a low-key look, wearing a black top, black pants and matching shoes, which she topped with a long, tan trench coat. Disick also chose a comfortable ensemble for their lunch date, sporting a black sweatshirt, navy blue pants and royal blue Nike low-top sneakers.

Disick's girlfriend looked gorgeous in a gray t-shirt, army green jacket, ripped jeans and white sneakers for the occasion. She was also spotted touting a small black leather bag.   

Kourtney started dating Disick back in 2006 after the two met for the first time at a house party hosted by "Girls Gone Wild" founder Joe Francis. The two reality stars dated on and off for almost 10 years before they finally split for good in July 2015.

Following their split, Kourtney moved on with younger man Younes Bendjima, whom she dated from 2017 to 2018. Kourtney and her much younger beau parted ways in the summer of 2018 after dating for almost two years.

In December last year, Bendjima posted a sweet tribute to Kourtney on his Instagram, sharing photos of their time together. 

"Let's not forget this beautiful woman inside and out," he wrote. "I'm not the type of man that forgets moments like that. You [are] an amazing woman and mum and I hope you will find happiness for you and your childrens. It's all love at the end of the day...we don't know what can happen tmw so there you go. (sic)"

Kourtney seemingly responded to Bendjima's message with a video post, with the caption, "All love. We live and learn."

Meanwhile, Disick's relationship with Richie has been going strong since they began seeing each other in 2017. The two made their relationship Instagram-official on Sept. 24, 2017 after being plagued with dating rumors for months.