"Harry Potter" author J.K. Rowling on Monday promised to match donations up to 1 million pounds ($1.3 million, 1.2 million euros) to a charity she co-founded to help children in Ukraine.
The writer set up Lumos in 2005 "to end the systematic institutionalization of children", including in the Zhytomyr region west of the Ukrainian capital, Kyiv.
The charity said the area, where more than 1,500 children were trapped in orphanages even before the invasion, was now under attack from Russian forces.
It wants an urgent end to military action to protect the estimated 100,000 children living in institutions in Ukraine and to prevent more family separations.
In response to Lumos' appeal to fund urgent supplies and care for youngsters in orphanages, Rowling tweeted: "I will personally match donations to this appeal, up to £1m."
Donations will go towards providing emergency food, hygiene and medical kits, and funding support families and foster carers to look after displaced and traumatized youngsters.