In the popular TV show "Servant of the People" Volodymyr Zelenskiy played a history teacher who becomes president of Ukraine (he's pictured here in character). Now Zelenskiy is actually running for president and just reached the runoff election. The comedian is well-known across the country. In a campaign ad, he calls himself a clown. Could this help him win the second round of voting on April 21?

Do you recognize him? This is Ronald Reagan, president of the United States from 1981 to 1989. In his previous career, "the Gipper" (Seen here in "Cattle Queen of Montana") was a Hollywood actor. But president wasn't his first job in politics. From 1967 to 1975 he was governor of California. Among his famous campaign supporters were entertainment heavyweights such as John Wayne and Walt Disney.

Michel Martelly became famous during the 1980s in Haiti performing as the musician "Sweet Micky." He was known for his flashy fashion choices ― and even dropping his pants on stage. Martelly later served as Haitian president from 2011 to 2016, where he oversaw the country's rebuilding after the devastating 2010 earthquake. Hurricane Matthew then caused widespread destruction across Haiti in 2016.

Come along for a short trip back in time: World War I had just ended when gifted pianist and composer Ignacy Jan Paderewski was called on to become prime minister and foreign minister of re-established Poland. It was in this role that he signed the Treaty of Versailles for his country. After less than a year in office, Paderewski stepped down, but occasionally returned to politics.

The current Pakistani prime minister was previously a highly successful cricket player: As team captain, Imran Khan (center, with flag) lead Pakistan to victory at the 1992 Cricket World Cup. He founded his own party in 1996 and was a member of parliament for some time. In the 2018 election, Khan's Movement for Justice party won the most seats in the National Assembly and he became prime minister.

George Weah was a successful artist as well, on the football pitch that is. The Liberian played for some of the biggest clubs in Europe and in 1995 was named FIFA World Player of the Year, the only African to win the award to date. He entered politics after retiring from football, first launching an unsuccessful bid for president in 2005. He ultimately succeeded in 2017.

Silvio Berlusconi didn't start out as a politician, either. He paid for his studies by working as a pianist and singer on cruise ships, then achieved fame as a developer and media tycoon ― and later infamy from the scandal over his "bunga bunga" parties. He rose to become Italy's prime minister in 1994, marking the first of his four (nonconsecutive) terms as head of government.

Donald Trump achieved celebrity status in the United States during the 1970s and 80s as the face of his family's eponymous real estate business. In 2003, he began hosting the popular reality TV show "The Apprentice." In 2015, after long hinting at a bid for the presidency, he launched the campaign that ultimately, if unexpectedly, took him to the White House.

Rapper Bobi Wine is not president yet, but he is likely to run in 2021. He's held a seat in Uganda's parliament under his real name, Robert Kyagulanyi, since 2017 and has been mobilizing the predominately young population against long-time President Yoweri Museveni. Wine's political rise hasn't always been rosy: His driver was shot dead last year and he himself was arrested and allegedly tortured.