"[Bullying] can happen for many reasons. It is often stupid and cruel, and can take many forms," the 34-year-old royal explains in the impassioned video. "The reach of technology means it can feel unrelenting, leaving the victim feeling attacked, powerless and isolated."
In the powerful call-to-action, Prince William reveals that over 16,000 young people in the U.K. miss school due to fear of being bullied and tormented.
"To shatter their trust in relationships and faith in the world around them, at such a young age, can have a lasting impact on their mental health and state of mind," he explained. "This cannot be allowed to continue, and it's why I am supporting The Diana Award Stand Up To Bullying Campaign."
The Diana Award is a charity founded in 1999 as a legacy to the late Princess Diana's "belief that young people have the power to change the world," according to the foundation's website. The Diana Award is also part of The Royal Foundation's Cyberbullying Taskforce, which Prince William recently launched in an effort to support the victims of targeted online harassment.
"It is our collective responsibility to be alert and be ready to challenge the behavior we see around us. We all have a role to play to insure that we do not stand by, but instead stand up, and put a stop to bullying."