Ukrainians are heading to the polls on Sunday to vote in the first round of presidential elections.
Current leader Petro Poroshenko is seeking re-election but the surprise front runner is comedian Volodymyr Zelenskiy.
Both candidates, along with former Prime Minister Yulia Tymoshenko, have expressed largely pro-European views during campaigning.
None of the pro-Russian candidates are seen as serious contenders.
If no candidate gets more than 50% on Sunday, the top two will fight it out in a second round on 21 April.
A total of 39 candidates are on the ballot paper, but only the three front-runners are considered to have any chance of victory.
The Ukrainian president has significant powers over security, defence and foreign policy and the ex-Soviet republic's system is described as semi-presidential.
Mr Poroshenko, one of Ukraine's wealthiest oligarchs, was elected in a snap vote after former pro-Russian President Viktor Yanukovych was toppled in the February 2014 Maidan Revolution, which was followed by Russia's annexation of Crimea and a Russian-backed insurgency in the east.
The next president will inherit a deadlocked conflict between Ukrainian troops and…
