New Ukrainian President Volodymyr Zelenskiy, left, walks after inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Ukrainian TV star Volodymyr Zelenskiy was sworn in as the country's new president on Monday, promised to tackle the economic stagnation that has left millions in poverty and immediately disbanded the parliament that he has branded as a group only interested in self-enrichment. Even before he disbanded the Supreme Rada, which had been one of his campaign promises, the 41-year-old Zelenskiy had upended the traditions of Ukrainian politics. (AP Photo/Evgeniy Maloletka)

KIEV, Ukraine (AP) — Ukraine's new president, a comedian before he turned to statecraft, made a dramatic entrance to the political stage Monday by disbanding parliament minutes after his inauguration.

Volodymyr Zelenskiy, who won 73% of the vote last month, justified his contentious decision on the grounds that the legislature, controlled by allies of the man he defeated, is riddled with self-enrichment.

Elections to the Supreme Rada were scheduled for Oct. 27, which raised the prospect of Zelenskiy struggling to enact his agenda in the face of a hostile parliament over his first few months in power.

A snap parliamentary election will be held within two months of his signing a formal dissolution decree.

Zelenskiy, a comedian who played the role of a Ukrainian president on a popular TV show for years, is gambling that his popularity will see the next parliament dominated by supporters of his agenda to reform Ukraine and steer a new path with Russia.

Zelenskiy said Ukrainian politics for the past quarter-century created "opportunities for kickbacks, money laundering and corruption."

Zelenskiy's efforts follow repeated attempts by the majority in the current parliament to stymie his campaign promise for a new election.

Since last month's election, Zelenskiy's opponents in the Rada sought to put off the inauguration close to the May 27 deadline by which the parliament can be dissolved.

And in a dramatic move last week, the Rada announced the collapse of the ruling parliamentary coalition. According to parliamentary rules, the chamber can't be dissolved for 30 days after the governing coalition has been disbanded.

Zelenskiy's supporters argue that the Rada's actions are legally void because the coalition had long ceased to exist and that the Ukrainian Constitution, unlike the Rada regulations, doesn't contain such a rule.

Volodymyr Fesenko, head of the Kiev-based think-tank Penta, said Zelenskiy's announcement shows "political will for radical change."

"The legally dubious decision to disband parliament will certainly be contested in court but Zelenskiy has shown that it is going to be him who will lay down the agenda and that he will dominate the political landscape," he said.

Zelenskiy's landslide victory reflected Ukrainians' exhaustion with widespread corruption and the country's political elite. Before disbanding parliament, the 41-year-old Zelenskiy upended other Ukrainian political traditions on inauguration day.

He ditched the idea of a traditional motorcade to his inauguration, walking to the parliament in Kiev through a park packed with people. Flanked by four bodyguards, the beaming president-elect gave high-fives to some spectators, even stopping to take a selfie with one of them.

At the end of his swearing-in ceremony, Zelenskiy asked the Supreme Rada to adopt a bill against illegal enrichment and support his motions to fire the country's defense minister, the head of the Ukrainian Security Service (SBU) and the Prosecutor General. All are allies of Zelenskiy's predecessor, Petro Poroshenko.

That's when he dropped his bombshell about dissolving parliament. Zelenskiy told lawmakers they only have a few weeks to support his motions, as that's as long as the current parliament has.

Two of the three officials he has asked to leave, Defense Minister Stepan Poltorak and SBU chief Vasyl Grytsak, promptly handed in their resignations.

Later, Prime Minister Volodymyr Groysman said he would resign Wednesday. That move would be largely symbolic because it would have to be approved by the parliament. If accepted, he would remain as acting prime minister until after the elections.

Zelenskiy also told the Rada that the main goal for the presidency is to bring peace to eastern Ukraine, where government troops have been fighting Russia-backed separatists for five years in a conflict that has left at least 13,000 dead.

"I'm ready to do everything so that our heroes don't die there," he said. "It wasn't us who started that war. But we need to be the one to finish it."

The new president wrapped up his speech at parliament by referring to his career as a comedian.

"Throughout all of my life, I tried to do everything to make Ukrainians laugh," he said with a smile. "In the next five years I will do everything, Ukrainians, so that you don't cry."

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Nataliya Vasilyeva reported from Moscow. Vladimir Isachenkov in Moscow and Yuras Karmanau in Minsk, Belarus, contributed to this report.

Ukrainian President-elect Volodymyr Zelenskiy swears on the Bible as he takes the oath of office during his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Efrem Lukatsky)
Ukrainian new President Volodymyr Zelenskiy gestures during his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Efrem Lukatsky)
Ukrainian new President Volodymyr Zelenskiy holds a mace, the Ukrainian symbol of power, during his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Ukrainian TV star Volodymyr Zelenskiy was sworn in as the country's new president on Monday, promised to stop the war in the country's east against Russian-backed separatists and immediately disbanded parliament, which he has branded as a group only interested in self-enrichment. Ukrainian parliament speaker Andriy Parubiy is in the background. (Markiv Mykhailo, Ukrainian Presidential Press Service via AP)
Ukrainian President-elect Volodymyr Zelenskiy greeds supporters before inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Zelenskiy overwhelming won the presidential election last month, beating incumbent Petro Poroshenko. (AP Photo/Efrem Lukatsky)
Ukrainian President-elect Volodymyr Zelenskiy greeds his supporters before inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Zelenskiy overwhelming won the presidential election last month, beating incumbent Petro Poroshenko. (AP Photo/Efrem Lukatsky)
Ukrainian new President Volodymyr Zelenskiy holds the Ukrainian symbols of power during his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Efrem Lukatsky)
Ukrainian President-elect Volodymyr Zelenskiy sings the national anthem during his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Efrem Lukatsky)
Ukrainian new President Volodymyr Zelenskiy, center, sings the national anthem during his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Efrem Lukatsky)
People gather in front of Verkhovna Rada, the Ukrainian parliament, during the inauguration ceremony of new Ukrainian President Volodymyr Zelenskiy, right on the screen, in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Evgeniy Maloletka)
Ukrainian new President Volodymyr Zelenskiy gestures while speaking during his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Efrem Lukatsky)
Ukrainian President-elect Volodymyr Zelenskiy greets supporters before his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Evgeniy Maloletka)
Ukrainian new President Volodymyr Zelenskiy, background right, sings the national anthem during his inauguration ceremony in Kiev, Ukraine, Monday, May 20, 2019. Ukrainian TV star Volodymyr Zelenskiy was sworn in as the country's new president on Monday, promised to stop the war in the country's east against Russian-backed separatists and immediately disbanded parliament, which he has branded as a group only interested in self-enrichment. (AP Photo/Efrem Lukatsky)
A couple react as people gather near Verkhovna Rada, the Ukrainian parliament, during the inauguration ceremony of new Ukrainian President Volodymyr Zelenskiy in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Evgeniy Maloletka)
A woman reacts as people gather near Verkhovna Rada, the Ukrainian parliament, during the inauguration ceremony of new Ukrainian President Volodymyr Zelenskiy in Kiev, Ukraine, Monday, May 20, 2019. Television star Volodymyr Zelenskiy has been sworn in as Ukraine's next president after he beat the incumbent at the polls last month. The ceremony was held at Ukrainian parliament in Kiev on Monday morning. (AP Photo/Evgeniy Maloletka)