Rebel Wilson welcomes her first child in surprise Instagram post

Congratulations are in order for Rebel Wilson!

The Australian actress has just become a mother after welcoming her baby girl into the world.

Taking to Instagram, the 42-year-old announced the news by sharing a photo of the newborn.

Alongside the picture, she wrote: "Beyond proud to announce the birth of my first child, Royce Lillian, born this past week via surrogate 💗.

I can’t even describe the love I have for her, she’s a beautiful miracle! I am forever grateful to everyone who has been involved, (you know who you are), this has been years in the making…

She continued: "But particularly wanted to thank my gorgeous surrogate who carried her and birthed her with such grace and care. Thank you for helping me start my own family, it’s an amazing gift. The BEST gift!!

"I am ready to give little Roycie all the love imaginable. I am learning quickly…much respect to all the Mums out there! Proud to be in your club. 💗💗💗"

Wilson has been dating Ramona Agruma for seven months, with Wilson recently denying reports that the pair were engaged.

They began dating in April and went public with the relationship two months later.