Can you hear that? It's the screams of millions and millions of teenagers across the country.

Many have already started to line up at theaters for this Friday's opening of Jonas Brothers: The 3D Concert Experience.

The behind-the-scenes look at Nick, Joe and Kevin premiered in Hollywood earlier this week, as the world's sexiest siblings were joined at the event by a few of their closest friends.

Here's a look at the young studs themselves at the premiere:

The Jonas Brothers weren't the only young celebrities on the red carpet. Friends such as Demi Lovato and Jordin Sparks attended the screening, as well.

Click on the following photos to see who else was there:

[Photos: Splash News]