Today, Barbados became a republic and held a ceremony as it removed Queen Elizabeth as head of state. Prince Charles was in attendance, but the overnight celebration was a bit much for the 73-year-old royal.

Barbados held the historic event on Monday night and into the early hours of Tuesday morning. For Prince Charles, it was virtually an all-nighter, as the ceremony began at 11:30 p.m. local time — which is 3:30 a.m. in the UK.

Prince Charles falls asleep at Barbados republic ceremony

At one point, Prince Charles was caught on video nodding off. While seated, his eyes began to close and his head visibly fell forward. The royal caught himself after a few seconds, but the moment was still noticed by the Daily Mail.

Despite the snoozy moment at the event, Prince Charles also delivered a passionate speech which has been making headlines.

In his address, made in Bridgetown, Barbados, the heir to the throne reflected on British imperialism and condemned slavery as an "appalling atrocity which forever stains our history."

Barbados had been a British colony since 1625. It became an independent state in 1966 but remained a constitutional monarchy headed by Queen Elizabeth until today.

55 years after gaining independence, the Caribbean nation is now a republic and Sandra Mason is its first President.

In a statement, the Queen congratulated Barbados and added: "I look forward to the continuation of the friendship between our two countries and peoples."

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