It was the moment the entire world was awaiting with baited breath - the arrival of the Duke and Duchess of Cambridge's baby boy.
Catherine gave birth to her son on 23 April 2018 on St George's Day, and just seven hours following his arrival, the world got to see the happy family.
Stepping out onto the steps of the Lindo Wing, Kate and Wills were radiant as they showed everyone their newborn.
What Duchess Kate wore after giving birth to the royal baby
Smiling to a sea of photographers, Duchess Catherine wore a custom-made red lace dress by Jenny Packham, with a Peter Pan white lace collar.
Jenny is one of the Duchess' go-to designers, and has designed all three of her post-baby reveal outfits.
The new mum completed the outfit with her favourite nude Gianvito Rossi heels.
Kate stuck with her signature blow-dried hair and showcased her new mum glow with soft natural make-up.
With her son gently cradled in her arm, royal fans across the globe were taken back to 1984.
The Duchess' PA and stylist Natasha Archer was seen exiting the Lindo Wing earlier after reportedly dropping off Kate's outfit.
While her personal hairdresser, Amanda Cook Tucker was responsible for her perfect locks.
And her clothing choice striked a cord with everyone, bearing a close resemblance to Princess Diana's look following the birth of her second son, Prince Harry.
A trip down memory lane... Kate's outfit after welcoming George and Charlotte
The 36-year-old also channeled Diana after the birth of her first child, Prince George.
The entire world was moved with emotion when she stepped out in a Jenny Packham blue polka dot frock, looking very much like a modern take on Princess Diana's gown after she gave birth to William in 1982.
Duchess Kate goes for sunshine-yellow with Princess Charlotte
The Duchess of Cambridge was all smiles in 2015 when she showed the world her daughter.
That year, Jenny Packham decided to dress Kate in a yellow floral shift dress.
What royal baby wore
Kate and William's new baby boy was dressed in what is thought to be the same beautiful shawl that his big brother and sister, Prince George and Princess Charlotte, both wore when they left the Lindo Wing for the first time.
The stunning shawl was made by GH Hurt and Sons in Nottinghamshire.
Speaking out after they heard the royals first used their design in 2013, the company said, "We're working incredibly hard. It's taken us by surprise because we're a small family firm of less than 20 employees."
After Charlotte's arrival, they added: "We at G H Hurt and Son were thrilled and delighted to see TRH the Duke and Duchess of Cambridge emerge from St Mary's Hospital, with their new daughter Princess Charlotte, wrapped in one of our Elegant Soft Wool Baby Shawls."
Taking a note from his big sister, the baby prince also rocked a knitted cap, protecting him from the windy elements.
While there is no word on where the items are from, Princess Charlotte's bonnet was a gift from the family's nanny, Maria Teresa Turrion Barrallo, who takes care of the little Prince and Princess.
What Princess Charlotte wore to meet her baby brother
After Prince George finished school for the day, he and Princess Charlotte arrived at St Mary's hospital to meet their new baby brother.
The siblings were both adorably dressed in blue... Maybe a subtle nod to the new prince.
George remained in his Thomas's Battersea school uniform, looking rather shy as he arrived.
Want more on the Royal Baby? Listen to the latest podcast of Woman's Day Uncensored where the team dissect everything from Kate Middleton's super-speedy delivery, to her tribute to Diana and of course, what the new prince might be named!
Princess Charlotte, however, truly stole the show.
Smiling and waving to the cameras, we got to see the 2-year-old's personality shine.
For the big occasion, she was dressed in a blue floral print dress.
The blue smocked dress was actually designed by an old school friend of Catherine's, Alice Avenel.
The pal from Marlborough college created the £45 [about $82] Periwinkle dress under her brand Little Alice London.
Proving she's already a fashionista, Charlotte completed the look with an Amaia Kids navy cardigan and Mary Jane shoes from the same brand.