Article will continue after advertisement

Prince William has released a new public service announcement on social media encouraging people to stand up against bullying.

The princeĀ used strong words in the video posted to Instagram.

“It is our collective responsibility to be alert, and to be ready to challenge the behavior we see around us,” said the duke of Cambridge. “We all have a role to play to ensure that we do not stand by, but instead stand up and put a stop to bullying.”

The Prince is heading up a cyber-bullying task force. The video message was released Tuesday forĀ the first-ever Stand Up to Bullying Day, spearheaded by the Diana Award which encourages young people to empower and change the world.