Scott Disick and Sofia Richie are said to be open about their relationship.

According to insider reports, the 'Keeping Up With The Kardashians' actor and the 19-year-old model are much more than good friends. A confidant chats to Us Weekly that the romance between the two stars "became official over the past week" when they were both in New York.

However, the fresh love affair feels "strange" to everyone: "Not only because of the age difference, but above all because Sofia was a family member for years and Kendall and Kylie [Jenner] were close." The fact that Nicole Richie's sister now suddenly joins in with Scott, who is 15 years younger and has three children with Kendall and Kylie's half-sister Kourtney, is even bizarre for the reality family, who is used to dramas.

Sofia herself, who is mostly known for her relationship with Justin Bieber, has so far denied that more is going on with Scott. So she tweeted: "I am single and concentrate on my friends, family and work."