Kourtney Kardashian posts first sweet snap of baby Reign

Nearly four months after Kourtney Kardashian and Scott Disick welcomed their third child, the reality TV star has posted the first sweet snap of the baby. "My little turtle dove angel baby boy Reign Aston Disick," Kourtney captioned the shot, which showed the little boy with a smile in his eyes and his arms above his head.

Given that baby Reign was born on 14 December, Kourtney's sweet nickname could have been a reference to the season.

My little turtle dove angel baby boy Reign Aston Disick.

A photo posted by Kourtney Kardashian (@kourtneykardash) on

The birth date is also their son Mason's birthday, the couple's first born. "The family is freaking out with joy," a source told E! News. "What an amazing coincidence."

Previous to Thursday's Instagram post, 35-year-old Kourtney had only shared a peek at Reign's tiny hand, writing: "Madly in love with my little Reign Aston Disick."

Comments on Kourtney's post from fans included "Absolutely perfect" and "image of his big brother".

The picture is some good news for Keeping Up With The Kardashian's fans, as it comes a week after Scott surprised fans by leaving rehab after just a week. It has been a difficult year for Scott, who is known for his partying ways and has seen them documented in the E! reality show.

Scott Disick and Kourtney Kardashian

The 31-year-old said in a statement at the time: "I realize my issues are bigger than me and I'm ready to truly remedy this struggle I continue to battle."

However Kourtney Kardashian's long-time love has insisted that that was always the plan. Scott, who made the brave decision to enter the facility earlier this month, says he plans to go back to the Rythmia Life Advancement Center at a later date.

"The funny thing is, a lot of people were under the impression that I was going to this rehab facility in Costa Rica for a month," Scott told People magazine. "When the truth was, I was going for a week for one treatment that they have there.