Proud mother of four, Kim Kardashian has taken to Instagram to gush over her fourth child, Psalm West, who is just three-months-old.

The 38-year-old reality star shared this adorable photo of herself cradling her youngest son and called him ‘the best baby’ and the ‘sweetest ever.’

She wrote in her caption: ‘My little man is the sweetest ever! He’s honestly the best baby. Sleeps through the night and by far my most calm. How did I get so lucky.’

Kim Kardashian is also mother to North West, 6, Saint West, 3, and Chicago West, 1.