Before they waltz down the aisle in September, Dancing with the Stars alumni Alec Mazo and Edyta Sliwinska took their love to Las Vegas for a joint bachelor and bachelorette party over the weekend.

Along for the celebration was Mazo's Dancing partner (and season one champ) Kelly Monaco, Cheryl Burke with boyfriend Matthew Lawrence, Kym Johnson and Karina Smirnoff.

According to People magazine, the group arrived Saturday, got settled into a suite in the Planet Hollywood Hotel and immediately parted ways.

The girls went off to the hotel's Heart Bar and later partied at Moon Nightclub at the Palms, while the guys took their party to a boat at nearby Lake Mead.

During the most recent season of Dancing with the Stars, Mazo was partnered with model Paulina Porizkova, while Sliwinska danced with former Cheers star John Ratzenberger.

The parties wrapped up on Sunday in true bachelor/bachelorette party style â€" relaxing at Bare, a top-optional pool at the Mirage, followed by some gambling.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.