Welcome to the world baby Faiers! Sam has given birth to a BOY

Sam Faiers has given birth to a gorgeous baby boy. 

The former TOWIE star welcomed her new arrival yesterday, and took to Instagram to share the great news. 

She posted a black and white photo of her new son's hand curled around his mum and dad, Paul Knightley's, and captioned the picture: "Welcome to the world our beautiful baby boy 29.12.15."

She's keeping other details like the name of her new son and his weight under wraps for now. 

Sam's older sister, Billie was one of the first to congratulate the reality star.

"I am the proudest sister and auntie in the world @samanthafaiers1 and Paul … I cannot describe my love for my beautiful nephew … I love you all so much and I can't wait for all the wonderful time we are going to spend together with him and Nelly …"

We can't wait to see more of Sam's new arrival!