KIEV, Ukraine — President Volodymyr Zelensky was on his way to winning a convincing mandate for his agenda in Ukraine’s parliamentary elections on Sunday, matching his landslide victory in the presidential race three months ago.

Exit polling showed that Zelensky’s Servant of the People party, named for the television comedy in which he played an unknown schoolteacher who is catapulted to the presidency overnight, winning 44 percent of the vote.

The exit poll, a joint project of three Ukrainian agencies, placed Zelensky’s party well ahead of four other parties that are predicted to meet the 5 percent threshold to enter parliament. They are Opposition Platform — for Life, a pro-Russian party, with 11.5 percent, former president Petro Poroshenko’s political bloc, European Solidarity, with 9 percent, former prime minister Yulia Tymoshenko’s Fatherland party, with 7.6 percent, and Holos, or Voice, the newly formed party of Ukraine’s most famous rock star, Svyatoslav Vakarchuk, with 6.3. percent.

Half of the deputies in Ukraine’s 450-seat parliament are chosen from party lists according to the popular vote, and half in individual districts in first-past-the-post contests.

Some analysts contend Zelensky’s party could win an outright parliamentary majority, which would be a first for any party since Ukraine gained independence in 1991. Others see a coalition as more likely.

Parliament’s composition will become clear when the results of the individual races are announced.

But whatever the final outcome, Zelensky’s triumph means his party will dominate parliament, and he could become one of the most powerful leaders in the history of this geopolitically pivotal former Soviet republic, where security forces continue to battle Russian-backed separatists and Russian forces in the east.

Zelensky defeated Poroshenko in the April presidential election by nearly 50 percentage points, though his only previous political experience was playing a president on television.

After voting at a polling station outside the center of Kiev earlier Sunday, Zelensky told reporters that he did not envision forming a coalition “with anyone from the old leadership.”

He said he wanted a prime minister who was a professional economist and “an absolutely independent person who has never been a prime minister, a speaker or a leader of any faction.”

Analysts say Vakarchuk’s Holos would be the most probable candidate to become a coalition partner.

Vakarchuk, 44, told reporters he would wait to see the results before talking about any partnerships. But he did not rule out joining a coalition.

In one of his first acts as president, Zelensky called the elections three months earlier than originally scheduled, he said, to prepare the way for his reformist political program.

Poroshenko’s party and his allies still control parliament, which under Ukrainian law has the power to approve and remove many government ministers. As a result, Zelensky has been working largely with a Poroshenko-appointed cabinet.

In calling the snap elections, Zelensky also hoped to continue to mine the anti-establishment sentiment that swept him to power before disillusionment sets in among the electorate.

Five years after widespread protests in Ukraine ousted Moscow-friendly President Viktor Yanukovych, many voters are frustrated at what they see as the slow pace of reform, persistent corruption, an anemic economy and the lack of progress in resolving the conflict in the country’s east.

But questions remain over what, exactly, Zelensky’s agenda will entail. He has named well-known reformists to top positions, launched initiatives and said he would preserve Ukraine’s pro-Western political orientation.

But he has also taken actions that have alarmed Western officials, such as calling for officials from the previous administration to be banned from serving in government.

Ihor Klymonchuk, 26, an IT specialist at a local bank, said he voted for Holos “because I think they’re honest.”

“I don’t support Servant of the People because I see in his team a lot of the same old corrupt faces who are trying to say that they’re new,” Klymonchuk added.

But Andrei, a soldier who preferred not to give his last name because he served in the army, said he voted for Zelensky and his party because he was “completely disappointed in the whole situation.”

“I want to give Zelensky and his party a chance to change something,” Andrei said. “Everything will become clear if he wins a majority.”

An earlier version of this story included an incorrect age for Ukraine soldier Andrei.