NBA Hall of Famer Dennis Rodman arrived in Singapore on Monday ahead of a summit between President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE and North Korean leader Kim Jong Un.

Rodman, whose trip to the country was sponsored by a digital currency for marijuana purchases called Potcoin, arrived hours before the Tuesday summit.

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The former NBA player and "Celebrity Apprentice" contestant has visited North Korea five times and met with Kim, whom he has called "a friend for life."

WATCH: Dennis Rodman arrives in Singapore ahead of Trump-Kim summit.



NBC News' @KellyO says it's unclear what role Rodman will play in the talks. pic.twitter.com/mPNqSCaUzR — MSNBC (@MSNBC) June 11, 2018

Rodman told reporters on Monday to keep their expectations low ahead of the meeting between Trump and Kim, which is slated to become the first-ever meeting between a sitting U.S. president and North Korean leader.

“People best not expect so much the first time,” Rodman said. “I’m hoping, like I said, that the door’s opening.”

“It’s exciting to be a part of it,” Rodman added.

Trump said last week that Rodman was not invited to the summit. However, the player has said that he will "give whatever support is needed to my friends," referring to Trump and Kim.