The event, which ties in with the beginning of Anti-Bullying Week on 15 November, will involve avatars of children, parents, teachers and celebrities taking a stand by "marching" across the homepages of participating brands’ websites.
Some partners have also created "sponsored tents" on Beatbullying's Big March website featuring interactive content designed to promote children's wellbeing.
The charity is aiming to attract tens of thousands of supporters and is asking people to sign a petition calling on the government to take more action on the issue.
