• Dance Moms Cast

Dance Moms Cast (Photo : Instagram/therealabbyleemiller)

The cast of "Dance Moms" season 6 were recently spotted at Monday night's episode of "Dancing With the Stars" season 21.

Nia Frazer, JoJo Siwa, Kendall Vertes, Kalani Hilliker and Brynn Rumfallo were also joined by their ALDC coach Abby Lee Miller.

The young professional dancers were all spotted cheering for this season's contestants on "Dancing With the Stars."

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Meanwhile, Vertes posted a photo of herself and her best friend Hilliker before heading to the show's studio.

"My @beyonce twin," she captioned the photo. The two girls wore similar looking outfits, and had with them similar looking bags.

Siwa also posted a photo with her favorite "Dancing With the Stars" contestant Hayes Grier after the show.

"I met @hayesgrier! #DWTS," she captioned their photo.

Rumfallo also posted a photo ahead of Monday's night episode alongside her good friend Frazer.

"So excited to go to Dancing With The Stars tonight! What are you guys up to?" she wrote.

In other news, the Ziegler sisters weren't present at the venue because Maddie Ziegler is currently filming her scenes for the upcoming movie "The Book of Henry."

Miller also posted a photo featuring her young talents with dancing pro Allison Holker. Another photo featured the ALDC dancers with Grier.

"We had a great time last night! What an awesome cast this season. Bravo @DancingABC! #DWTS #ALDC #ALDCLA @aldcstudiola @itsjojosiwa @niasioux @brynnyboo222 @kk22xo @23kalani @gmartello22 @hayesgrier @allisonholker," she wrote.

As for her younger sister Mackenzie, it's unclear why she wasn't there.

"Dance Moms" season 6 will return to Lifetime in January 2016.