Who is Joining 'DWTS' This Season?

The cast of "Dancing with the Stars" Season 13 will be officially announced after Monday's episode of "Bachelor Pad," but "Extra" has the inside scoop on who may already be in rehearsal.

In the video below, George Clooney's ex, Elisabetta Canalis, was spotted leaving the "Dancing" studio, while NBA player Ron Artest showed up, trying to hide his face. Check it out!

As for the others who may be set to punch in their dance cards, the list reportedly will be: CNN host Nancy Grace; former "The Hills" Kristin Cavallari; TV personality Ricki Lake; singer Chynna Phillips; U.S. soccer goalie Hope Solo; actor David Arquette; Kardashian clan member Rob Kardashian; actor and reality TV star Ryan O'Neal; "All My Children" actor J.R. Martinez; and transgender advocate Chaz Bono.

Stay tuned to see who is in and who is out!