'Mila and I met with President Zelenski and his wife a little over a week ago,' he wrote in the first of three messages.
'My gut: He is committed to eliminating corruption in Ukraine. He's also committed to ending the war and grateful for the US financial commitment because they needed it.'
The US has been sending aid to Ukraine since the fall of the Soviet Union in the early 1990s, but in 2014 voted to significantly increase that aid after a revolution which saw the outbreak of war with Russian-backed separatists in its eastern regions.
In a second text, Kutcher added: 'If our president used that financial aid to leverage president Zelensky to investigate Biden he should be impeached.