Ukrainians go to the polls on Sunday in the second round of an election to pick the country's next president.
According to opinion polls, politically inexperienced comedian Volodymyr Zelenskiy is set to defeat incumbent rival Petro Poroshenko.
Poll stations are set to open 05:00 GMT and close 12 hours later.
A survey by the Rating pollster shows Zelensky winning 73 per cent of the vote, with Poroshenko getting only 27 per cent.
The winner of Sunday's vote will be elected for a five-year term as president.

Iran names Mojtaba Khamenei as new supreme leader
Trump says he is 'nowhere near' deciding to send troops to Iran
Lebanon parliament extends its own mandate for two years as war intensifies
France to deploy almost dozen warships, mulls Hormuz mission, Macron says
