Rex / REX USA / Rex USA 1 / 12
Rex / REX USA / Rex USA 1 / 12

The princess just wants her privacy.

Ahead of her 33rd birthday, Duchess Kate isn't exactly planning on throwing a bash. In fact, it will be quite the opposite.

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Kate, whose birthday is Jan. 9, is "spending the day privately," People Magazine reported, quoting a Kensington Palace source.

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The Duchess of Cambridge is believed to be at her newly renovated country home, Anmer Hall, with her husband, Prince William, and 17-month-old son, Prince George. The family recently celebrated Christmas there as well.

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The low-key affair may strike some as odd, based simply on the fact that the couple has had more boisterous affairs in recent years -- last year Kate celebrated in London, and two years ago she celebrated with William and friends at a Cirque du Soleil show.

But it seems that the expectant Kate may simply be using her big day to gear up for a slew of upcoming engagements in London, her first pubic outings in 2015. wants to be among the first to wish the Duchess happy birthday.