James Maslow: First 'Dancing with the Stars' Rehearsal Arrival Pics!

James Maslow throws up a peace sign as he heads inside for Dancing with the Stars rehearsal on Tuesday afternoon (March 4) in Los Angeles.

The 23-year-old Big Time Rush singer was soon followed by his dance partner Peta Murgatroyd.

PHOTOS: Check out the latest pics of James Maslow

Earlier in the day, it was announced that James had joined the season 18 cast during an appearance on Good Morning America.

“Beat from rehearsal…Dinner of champs! Thanks for the protein @musclepharm! @iamericthetrainer @ErictheTrainer @doughall07 @halldgoblue,” he tweeted.

Don’t forget to tune in to the premiere on Monday, March 17 @ 8PM on ABC!