The Duchess of Cambridge turns 37

The Duchess of Cambridge turns 37

Unless this is all a ruse to put us off the scent of a Wednesday night rager hosted by the Queen (and including at least 5 exclamations of "let them eat cake!"), it sounds like Kate plans to keep her special day pretty low-key.

She walked to the service at St Mary Magdalene Church on the Sandringham estate with husband Prince William and other royals, while the Queen travelled by auto. And keep in mind, Middleton has enjoyed more than a few wild birthday nights out.

Difference: Middleton previously celebrated her birthday by clubbing with her sister, Pippa, when she turned 26, according to Cosmopolitan.

William has an official engagement in the day, meeting pilots and paramedics from London's Air Ambulance. Yes, Kate's into theme parties!

William, 36, then sat in the captain's seat and flew the aircraft back to the hospital, the first time, the prince said, he has flown since June. The first one was a plush helicopter, flawless for William and Kate's newborn.

William will reportedly join his wife and family during the evening to mark Middleton's big day.

This was confirmed on Kensington Palace's Twitter account: "The Duke of Cambridge will visit @LDNairamb on Wednesday 9th January to recognise the work that their first responders carry out delivering life-saving treatment across London".

A source told Vanity Fair that Kate would celebrate her 37th with a little tea party at home with "candles and presents" alongside Prince George and Princess Charlotte.

The duke said "I did remember this morning, so I was OK", when given the card made by the young girl, whose family met the royal during his trip to the Royal London Hospital in east London.

2015: Pregnant (again), Kate spent another quiet birthday at home. Middleton was "equally handsome", but she's "fully made up" in 2015.

Another romantic gift bestowed on the duchess by her husband was an eternity band after she gave birth to Prince George in July 2013.