From taking on charities and patronages championing causes including mental health, children's early years and sport to honing her photography skills, she continues to be one of the most popular members of the British royal family.
What's more, Catherine's fashion has evolved to reach heights of sophistication and cultural significance, whether she steps out in a new dazzling outfit or a recycled gown.
Amongst the high praise, it's apparent that though Catherine is innately shy and introverted, those around her have noticed she has procured more profound confidence as of late.
"Hers is an understated presence. But she's quietly growing in confidence. She still finds it quite challenging to mix with those sorts of players, because she's a natural introvert. But she's really growing into the role," said one source.
With her husband and three loving children by her side, Kate is in good hands to welcome her forties in anticipation of all the milestones and successes to come.