The superstar couple announced their son's name last night, putting an end to speculation they were debating between Easton and Robert, in honour of Kim's late father Robert Kardashian.
A source told E! News – which airs on the same network as Keeping Up With The Kardashians - that Kimye opted for the name Saint as he is a blessing following Kim's tough pregnancy.
Kim, 35, has been open about difficulties she encountered while pregnant with the couple's second child, including requiring a procedure to turn him from breech position ahead of the birth.
A source told People that Kim had a difficult labour because of placenta accrete, where the placenta attaches itself to the uterus wall and may require manual removal.
Kim was also warned by doctors she was at risk of diabetes, which prompted her to overhaul her lifestyle and eat healthily and exercise.
All you need to know about Kim Kardashian: