The 39-year-old star visited pupils in the Donetsk region in the east of the country, which became the frontline in a conflict between the Ukrainian army and pro-Russian separatist forces, back in 2014.

Orlando, who is a United Nations (UN) Goodwill Ambassador, is the first Hollywood star to visit the country on behalf of the UN's children's charity Unicef since the beginning of hostilities.

The Pirates of the Caribbean star visited a classroom hit by shells while its students were at school, and heard about their experiences within the war-zone.

"I met children like 11-year-old Liana who hid in the basement of their school for almost two weeks, in freezing conditions, without lighting or heat, while shelling devastated the classrooms above," he said.

"Now, after surviving some of the most terrifying experiences life could possibly throw at them, all they want is to get back to the safety and routine of school and plan for their futures."

As part of the aid Unicef is providing to the region, the children are now receiving counselling from psychologists.

In eastern Ukraine, where there are still skirmishes between the separatists and government forces, an estimated 230,000 children have been forced from their homes, with 250,000 more thought to be in need of aid.

Around one in five schools in the region have damaged or destroyed leaving 300,000 children struggling to continue their education.