Last week on February 14, Valentine's Day, another devastating mass shooting took place in a US school. 17 people at Marjory Stoneman Douglas High School in Parkland, Florida were killed and 14 were taken to hospital with injuries. The suspected gunman, Nikolas Jacob Cruz (currently in custody) opened fire with a semi-automatic rifle indiscriminately taking out students and teachers.

Unfortunately this isn't an isolated incident, mass shootings in the US happen far too frequently with gun-control a major hot button issue in America. And the students are rising up. The Washington Post reports on Tuesday there were student and staff walk outs from a number of schools in Florida to protest gun violence and demand changes to gun control.

But it's not just Floridians taking action, 'March For Our Lives' an anti-gun movement working for, according to their website, "...safety to become a priority... and an end to gun violence and mass shootings in our schools," is holding a rally on March 24 in Washington DC (and at other locations around the US) to demand action on gun control.

And it's getting support at the highest celebrity levels. The Washington Post reports George and Amal Clooney, in a statement posted on the organisation's Facebook page, have pledged a donation of $500,000 USD to support March For Our Lives and will also march in the rally on March 24.

Oprah Winfrey has joined her friends and also pledged $500,000 USD to support March For Our Lives posting this message on twitter:

Oprah Winfrey March for Our Lives @oprah

George, Amal and Oprah support the anti-gun march in a HUGE way