Credit: Splash News Photo: Mark Ballas and Chelsie Hightower Spotted Leaving Toast Restaurant in Hollywood on May 14, 2011

Sound the adorable alarm! Dancing With the Stars pros — and very good friendsMark Ballas and Chelsie Hightower have joined the cast of A Capitol Fourth, the uber-popular Independence Day event which airs live from 8 to 9:30PM, Monday, July 4 on PBS.

According to a press release, Mark and Chelsie will help celebrate the 20th anniversary of Beauty and the Beast by dancing to American Idol winner Jordin Sparks' performance of the beloved Disney song. And get this — their Waltz, before a live concert audience of hundreds of thousands, will take place at the foot of the U.S. Capitol in the same location where the President is inaugurated. Way cool.

Jimmy Smits is hosting the all-star Capitol line-up, which includes performances from Steve Martin, Josh Groban, Glee star Matthew Morrison, and Little Richard.

Congrats, guys!

Source: PR Newswire