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1. Lady Gaga, then a teenager, recalls being at school in New York with her friends during the attacks. They watched the tragedy unfold from the roof of their school. Despite being distant from the Twin Towers, the impact of the tragedy filled the sky with darkness
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2. Michael Jackson had a phone call with his mother, Katherine, and his sister Rebbie the night before the attacks. This caused him to be late for a meeting at one of the Twin Towers, ultimately saving his life.
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3. Paul McCartney was at JFK airport in New York, waiting for takeoff, when he witnessed the Twin Towers burning from the window of his plane
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4. Seth MacFarlane almost got on the same flight as his friend Mark Wahlberg, but he was dealing with a hangover and missed it. He found out about the tragedy while waiting for another flight.
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5. Robert De Niro was in New York and saw the events from his window. He described the experience as surreal and terrifying.
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6. Gwyneth Paltrow almost hit a pedestrian in New York City that morning, which made her late for work. The pedestrian, Lara Lundstrom Clarke, worked at the World Trade Center and credits Paltrow for saving her life.
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7. Steve Buscemi, a former firefighter from the 1980s, volunteered and dedicated five days to assist in the rescue efforts after the attacks.
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8. Mark Wahlberg was scheduled to board one of the hijacked flights, but changed his mind at the last minute and traveled to a film festival in Toronto.
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9. Matt Damon was in his Lower Manhattan apartment, and he recalls stepping out, witnessing the tragedy unfolding before his eyes as he sought information on CNN.
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10. Al Pacino was in Los Angeles the night before the attacks and was eager to return home to New York.
On September 11, 2001, the world changed after the terrorist attacks on the United States. It was a tragic event that left a lasting impact on history and affected many celebrities as well.
In this gallery, we'll delve into what some famous people were up to during the 9/11 attacks. Their experiences echo the shock and impact felt worldwide, regardless of their fame.