The new cast of 'Dancing With the Stars' won't be announced until next week, but word is leaking out that singer-actress Christina Mllian and 'Glee' star Amber Riley will be among the celebs shaking their stuff in the ballroom.

Other rumored competitors for the 17th (!!) season of the reality competition include Snooki, Elizabeth Berkley, Leah Remini, Keyshawn Johnson, Jack Osbourne and Valerie Harper. The full 'DWTS' cast will be unveiled on 'Good Morning America' on Sept. 4.

Christina and Amber both had good reasons to take their shot at winning the show's signature Mirrorball Trophy, a source tells

The 31-year-old Milian, who just announced she will no longer be the social media correspondent for 'The Voice,' is seeing the experience as a stepping stone to reignite her music career, the source says.

Meanwhile, Amber, who plays 'Glee' diva Mercedes Jones, has been downgraded this season from series regular to recurring guest star. The source reports that she's doing 'DWTS' to make a fresh start with her career as well as lose some weight. She also is expected to dedicate her season to late 'Glee' castmate Cory Monteith.

The season premiere of 'Dancing With the Stars' is scheduled for Sept. 16 at 8PM ET.

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