Kate Middleton took a moment away from her new mom duty to raise awareness for a charity Credit: Anwar Hussein/WireImage

Kate Middleton might have her hands full as a busy mom of two now Princess Charlotte has joined her sibling Prince George as the newest member of the royal household — but she's still got time to think of others less fortunate than herself.

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Prince William's warm-hearted wife penned an emotional letter on behalf of Children's Hospice Week, a weeklong fund and awareness raising venture to help make sure parents of children with life-limiting illnesses have the support they need to make the most of every minute they have with their children.

The caring Duchess of Cambridge wrote a letter, sent from Kensington Palace, and released by the charity Together for Short Lives, explaining the importance of the event, which launches today, Monday, May 11, and runs through Sunday, May 17.

"For families of children with life-limiting conditions, every moment is precious and every memory needs to be cherished and celebrated," the 33-year-old Royal said in her note. "Children’s hospices strive to create happy moments in the most difficult times any family could face. I hope you will join me in supporting Children’s Hospice Week and work to make every moment count for all of our families,” she added.

The Duchess has seen firsthand, the invaluable work Children's Hospices do for families, via her work as a patron of East Anglia’s Children’s Hospices (EACH). She was moved to tears during an event in November last year after meeting and talking to a mother whose child had been cared for at one of the EACH hospices before she passed away.

The charity, Together for Short Lives, is urging people to support the week by sharing a memorable moment on social media using the hashtag #momentscount.