Rebel Wilson and Ramona Agruma celebrate daughter Royce Lillian's first birthday

Rebel Wilson and Ramona Agruma have marked one year since their little bundle of joy Royce Lillian was born.

Wilson shared a never-before-seen photo of her daughter's face on the occasion, which the private mum rarely does.

"Roycie", as she is affectionately called, can be seen wearing a pink jumper, denim shorts, and grey leggings underneath. She is sitting on the floor, resting her hand on a push bike toy. The picture labelled her as the "birthday girl".

Wilson's fiancée Agruma also posted a number of photos of the now-one-year-old. The family seemed to have gone on an outing in Sydney, standing by the water with the Sydney skyline in the background. Agruma shared photos of her cuddling Royce and posing with her by the water, her faced covered.

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She also shared an adorable throwback picture of Royce as a newborn being propped up on a huge plush bear. "Cant believe you're 1 today already from this little bundle of joy," she remarked.

Wilson is going all-out for the celebrations, sharing an impressive photo of what seems to be her present to her daughter, a handmade snow globe.

It features a Disney-inspired clay sculpture of Bambi surrounded by flowers, mushrooms, birds and butterflies on the bottom, with the glass top of the globe encasing a castle. "Happy Birthday my Princess!" Wilson wished alongside it.

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Wilson announced the birth of her first child this time last year, who she welcomed via surrogacy.

"Beyond proud to announce the birth of my first child, Royce Lillian, born this past week via surrogate," Wilson wrote on Instagram at the time, captioning the photo of her daughter with a love heart emoji.

"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… 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."