She began the impassioned missive -- headlined "I testify" -- by recalling the events of February 24.

"Tanks crossed the Ukrainian border, planes entered our airspace, missile launchers surrounded our cities," she wrote.

"Despite assurances from Kremlin-backed propaganda outlets, who call this a 'special operation' -- it is, in fact, the mass murder of Ukrainian civilians."

Zelenska highlighted the "terrifying and devastating" child casualties, while also describing the horror of babies born in bomb shelters and roads "flooded" with refugees.

The couple married in 2003 and had daughter Oleksandra a year later. Their son, Kyrylo, was born in 2013.

Like her husband, who has a law degree, Zelenska moved away from her academic field of interest and into showbusiness.

When her comedian husband first expressed his political ambitions, his wife was none too impressed. In the interview with Vogue, which featured a glamorous photo shoot, she said: "I was not too happy when I realized that those were the plans. I realized how everything would change, and what difficulties we would have to face."

She spoke of adjusting to life in the public sphere, but expressed her determination to protect her children, saying: "Let them choose how they want to live."

One of her campaigns has been to improve meals for children at school, going on fact-finding missions to Latvia, Japan and the USA, among other countries.

She wrote: "These are young cancer patients from Ukraine. Just yesterday, they were hiding from the shelling in the basements of clinics. Now they are crossing the Polish border on the way to find safety and, most importantly, to continue their treatments. No aggressor in the world can prevent them from winning the battle against the disease!"

"If we don't stop Putin, who threatens to start a nuclear war, there will be no safe place in the world for any of us."