Prince Harry's wife Meghan described Ms Watts as a "fearless leader" and offered "a big thank you for her stand"
Prince Harry's wife Meghan Markle has voiced her support for a mother-led gun control movement.
The Duchess of Sussex recently sent a letter of support to members of the Moms Demand Action group.
The letter from the mum of two, which shows her support for implementing stricter gun controls in the US, comes after her visit to Rob Elementary - where the school shooting took place in May.
The group was formed by activist Shannon Watts after the Sandy Hook school shooting, which occurred 10 years earlier when Adam Lanza shot and killed 26 people.
Archie and Lilibet's mother described Ms. Watts in her letter as a "fearless leader" and "thank you so much for the work you are doing to keep our children, families and communities safe". offered.