What event had the largest viewing audience?

The event with the largest viewing audience is often cited as the 2008 Summer Olympics opening ceremony in Beijing, which attracted approximately 1 billion viewers worldwide. This massive audience was drawn by the grandeur of the ceremony, showcasing China's culture and artistic achievements. Other events, such as the FIFA World Cup finals and the Super Bowl, also draw significant global audiences, but the Olympics' extensive reach during its two-week duration sets it apart.