Kate will use videos to speak directly to the public after discovering powerful impact of her messages during cancer treatment

Princess Catherine turns 43 after a challenging year fighting cancer. She took time off for treatment and focused on her health. Plans are in place for her and William to make more public appearances.

Bigger than the shift in how Kate will approach the logistics of her schedule, however, is the shift in the Wales' priorities going forward—and how they'll approach their dual roles as working royals and devoted parents to their three children, Prince George, 11, Princess Charlotte, 9, and Prince Louis, 6.

Despite being Queen-in-waiting, the Princess of Wales - who is a key cog in the Royal Family machine - refuses to let anything take over from her two priorities: family and health.

Kate Middleton is celebrating a big milestone this week, and after the year she's had, her husband Prince William is planning on making her birthday celebration extra special this year. Middleton is turning 43 on Thursday,