Russian President Vladimir Putin declared war on Ukraine by way of a special military operation on Thursday.

"Like many of you, I'm praying for the people of Ukraine. My focus along with my UNHCR colleagues is that everything possible is done to ensure the protection and basic human rights of those displaced, and refugees in the region," she wrote on Instagram.

Jolie, who is the Ambassador for the United Nations High Commissioner for Refugees, further wrote: "We have already seen reports of casualties and people starting to flee their homes to seek safety. It is too soon to know what will happen, but the significance of this moment – for the people of Ukraine, and for the international rule of law – cannot be overstated."