Disney World was forced to stop letting any more guests into the jam-packed Magic Kingdom before noon on New Year\'s Eve

If you want to celebrate New Year's Eve at Disney World, you need to show up early.

At 11:35 a.m. on Monday, Walt Disney World Today announced on Twitter that the Magic Kingdom was no longer allowing any more guests to enter the theme park. Epcot, Hollywood Studios, and Animal Kingdom remained open, as of 1 p.m. on Monday. 

The time between Christmas and New Year's Day is one of the busiest periods of the year for Disney World. New Year's Eve is especially popular, as each park has its own celebration to kick off the new year. 

"Magic Kingdom is the most popular park and will be the most crowded during New Year's Eve at Disney World," Disney's website warns. "If Magic Kingdom is your park of choice, we recommend you arrive early and stay all day since it is likely to reach capacity for some part of the day."

The crowds are also resulting in long lines for people visiting the parks. As of Monday at 1 p.m., it was a three-hour wait to ride Space Mountain, Big Thunder Mountain, or the Seven Dwarfs Mine Train, according to the Disney World app. 

Photos from the park show just how crowded Disney World can get around New Year's Eve.

Here's some more photos of the recent crowds at Disney World: 

This is not the first time that Disney has been forced to shut down the Magic Kingdom early on New Year's Eve. Last year, the park stopped accepting new guests at 11:30 a.m., but reopened its gates around 5:30 p.m., The Orlando Sentinel reported.