Sofia also posted a picture of a dessert plate with "Congratulations Scott and Sophia", written on it in chocolate.
In the KUWTK 10th Anniversary Special, Kourtney Kardashian implies that her feelings for Scott Disick are not completely gone. But not anymore, as the 34-year-old Keeping Up with the Kardashians star and the 19-year-old daughter of musician Lionel Richie went Instagram official on Saturday. Kourtney just wants Scott to be his old self.
It comes after Scott admitted Kourtney is the "only person" he's ever loved.
What are your thoughts on Scott Disick and Sofia Ritchie's relationship?
The party loving pair have been enjoying a loved up romantic holiday in Miami over the past few days, and continued their love in across the weekend as they were spotted hugging and kissing each other while on a boat with pals.
When the show's host Ryan Seacrest pressed Kourtney on the subject, she continued, saying that, 'Since we've broken up - the last time, which was nearly two years ago - we've never been back together, even though we've traveled together with the kids. Scott has been having a hard time since he and his babies mama, "Keeping Up With the Kardashians'" Kourtney K. called it quits. "But she has to draw the line somewhere, and this is it". "They're spending every day together".
Kourtney also confessed that she is not sure about the way that she would feel when he will be in a serious relationship with a new woman and when he would fall in love again with someone else.
"Sofia seems smitten", added the source.
"She's totally over it and can't help but be furious with him".
The rumour of their romance started during the Cannes Film Festival in May when they were first seen together.