Happy Birthday Duchess Kate! 36 of her best looks in honor of her 36th birthday

Happy Birthday, Kate Middleton!

The royal, who turned 36 on Tuesday, has some low-key plans for her special day.

"The Duchess will be having a quiet birthday at home with her family," a source told Us Weekly.

Another source told the Daily Star: "She is not drinking any alcohol and she is being careful with her food too. It will be quite a low key party."

Duchess Kate's 35th year was certainly one to remember, with major milestones such as the announcement of her third pregnancy and Prince George and Princess Charlotte's first day of school.

With the arrival of baby No. 3 in April, we have a feeling that her 36th year will be her best one yet!

In honor of her special day, we've rounded up Duchess Kate's most memorable looks. Check it out in the slideshow above!

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