The Duke and Duchess Of Cambridge just welcomed their little prince and everyone couldn't help but adore the newest addition to the royal family.

The now mother of three debuted her little bundle of joy alongside Prince William just hours after giving birth -- looking like an absolute perfection. As the royal family stepped out at the Lindo Wing, eagle-eyed fans were quick to notice a touching tribute to the late Princess Diana.

A subtle homage to the late grandmother

During the new prince's public appearance, fans were treated to a royal deja vu -- all thanks to Kate's subtle nod to Princess Diana.

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The Duchess of Cambridge, who looked happy and glowing despite hours of labor, channeled her late mother-in-law in the most touching and fashionable way.

All glammed up for the media, Prince William's wife donned a red Jenny Packham dress accentuated with a white lace Peter Pan collar and cream-toned heels.

The outfit strikingly resembles Princess Diana's looks when she and Prince Charles introduced Prince Harry to the world 34 years ago.

It can be recalled that the late royal stood in the same spot at Lindo Wing in 1984 wearing a long red jacket over a white collared layer. She also matched her look with a pair of low red heels.

This is not the first time that the Duchess of Cambridge paid tribute to Princess Diana with her fashion. In 2013, Kate wore a blue polka-dot dress by Jenny Packham when she presented Prince George for the first time.

The look was inspired by Princess Diana when she debuted Prince William in 1982.

The newest royal baby

The Duke and Duchess of Cambridge [VIDEO] welcomed their little bundle of joy around 11:01 AM. In a statement released by Kensington Palace, it was confirmed that the healthy baby boy weighed 8lbs 7oz, making him the biggest royal born in history.

According to reports, Prince William was present during the momentous event and stayed at his wife's side the entire time. Shortly after the baby was born, the second in line to the British throne left the hospital to pick up their older children -- Prince George, four, and Princess Charlotte [VIDEO], two.

The adorable royal siblings both looked excited to meet their baby brother. Prince George, who was still in his school uniform when they arrived, held his dad's hand, looking a bit shy.

Princess Charlotte, on the other hand, smiled and waved enthusiastically to the waiting crowd as they made their way inside the hospital.

The newest addition to the Cambridge's automatically becomes the fifth in line to the throne, pushing his uncle, Prince Harry, at the sixth spot.

So far, Prince William and Duchess Kate have yet to reveal the name of their newest prince.