Prince William is one attentive father.

Further evidence of this fact was just revealed in a new photo shared to Kensington Palace's and the Royal Family's Instagram accounts.

To mark the end of Volunteers' Week 2020, the royals posted a previously unseen family shot of William looking out for Prince George and Princess Charlotte while out in the rain on volunteer duty.

"As we approach the end of #VolunteersWeek The Duke and Duchess of Cambridge are pleased to share a new photo taken by The Duchess as they played their own part in the national volunteering effort," the caption read.

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The Cambridges had volunteer duty, rain or shine

The photo is from the family's volunteer outing in April, when they delivered essential goods to pensioners. Kate's candid shot shows father-of-three William quick to shield his children from the rain under an umbrella.

"In April, The Duke and Duchess and their family visited the Sandringham Estate where they packed up and delivered food parcels to isolated pensioners in the local area," the caption added.

Several photos of Princess Charlotte in action were also shared at the time.

The Queen, William and Kate mark Volunteers' Week 2020

Kate's new photo was also included in a series of images posted as part of a message from Queen Elizabeth II for Volunteers' Week.

"I send my best wishes to all those who give themselves so freely and selflessly in the service of others," the Queen's message said.

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The Duke and Duchess of Cambridge further contributed a video that showed them in conversation with volunteers. "To all the incredible volunteers across the UK this #VolunteersWeek: Thank you," their message read.

The UK's Volunteers' Week runs annually between June 1-7.