Hungary's Prime Minister Viktor Orban tweeted out his support for former President Trump Monday ahead of his Tuesday court appearance, telling the president to "keep on fighting."

"Keep on fighting, Mr. President! We are with you, @realDonaldTrump," Orban tweeted, paired with a photo of the two shaking hands during an August 2022 meeting at Trump's Bedminster, New Jersey, estate. Orban had traveled to the states to speak at the Conservative Political Action Conference (CPAC) in Texas. 

Orban has been vocal about his support for the former president in the past, with him being the first European leader to publicly endorse Trump’s presidential candidacy in 2016. The Hungarian prime minister also voiced his support for Trump's 2020 run. 

The support was later reciprocated as Orban sought a fourth straight term as prime minister last year, with Trump praising him as a "strong leader" who "truly loves his country." 

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"He has my complete support and endorsement for reelection as Prime Minister!" Trump wrote in a January 2022 statement. 

Donald Trump and Viktor Orban smile and shake hands behind an American flag

Hungary's Prime Minister Viktor Orban tweeted his support for former President Trump Monday ahead of his Tuesday court appearance, telling the president to "keep on fighting." (Andrew Harrer/Bloomberg via Getty Images)

Trump is expected to appear in New York court Tuesday after being indicted by a grand jury last week. Details of the indictment are still under seal but are expected to relate to alleged 2016 "hush money" payments made to adult film star Stormy Daniels and former Playboy model Karen McDougal, which the DA's office has been investigating for five years.

Donald Trump and Viktor Orban shake hands in the Oval Office

Orban was the first European national leader to publicly endorse Trump’s presidential candidacy in 2016. (Mark Wilson/Getty Images)

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Prosecutors are expected to argue that the $130,000 payment for Daniels and the $150,000 given to McDougal amounted to improper donations to the Trump campaign and helped him win the 2016 election.

Former President Donald Trump

Former President Trump has already announced he will be heading back home to Florida after his Tuesday morning court appearance to deliver remarks later that evening. (AP Photo/Andrew Harnik, File)

Trump has already announced he will be heading back home to Florida after his morning court appearance to deliver remarks later that evening. It is still unclear what Trump will say during his speech. However, some legal experts argue he may be under a "gag order" following the arraignment. 

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Fox News' Michael Lee and The Associated Press contributed to this report.