Update from our correspondent on the ground, Christopher Miller (follow his Twitter here):
"Monitors at six polling stations in Kyiv's Podil district told RFE/RL that turnout before 10 a.m. seemed higher than previous elections and no falsifications had been reported. Police were on hand in the event of any irregularities, as were monitors representing various civil society organizations and political parties.
At School No. 9 the entire Dobriyvechir family of four voted for Volodymyr Zelenskyy, with daughter Anastasia, 19, saying she believed the comic-turned-candidate is a "good man" who shares the same values in real life as the fictional president he plays in his hit sitcom Servant of the People.
"He's going to make our country better" like he does in his show, she said. Her mother, Svitlana, said that Zelenskyy was the obvious choice for her, because life hasn't become better under incumbent President Petro Poroshenko. "Life has gotten worse in the past five years," she said. "Utility prices have gotten higher and pensioners like our grandmother can't afford to live."
"Poroshenko delivered visa-free travel and the Tomos" -- the declaration that created a new, independent Orthodox Church of Ukraine -- "but otherwise he didn't do enough for us," Svitlana added.
Tweet from the German ambassador to Ukraine:
Polls have opened. Our Kyiv correspondent, Christopher Miller (@ChristopherJM) is out and about around the capital. He sends this:
"I’m at polling station number 557 in Kyiv’s Podil district. Iryna Podlesna, the head monitor here, just gave a brief speech to monitors in which she said “we are one team today.” After unlocking a safe and pulling out the ballots, she said, “let’s work together like dance partners.”
The ballot has 39 names on it and no photos.
A line of six people lined up 20 minutes before the polls opened to be among the first to vote."
Good morning! We're up and running now on coverage of Ukraine's presidential election today. Polls open in about 10 minutes.
A lot more soon but, for now, ease into the day and check out our series of video profiles on the front-runners: Volodymyr Zelenskyy, Petro Poroshenko, and Yulia Tymoshenko.