David Arquette Gets Ready to Rumba On "Dancing with the Stars"

8/25/2011 10:14 AM PDT

David Arquette will show what he's got on "Dancing with the Stars" ... sources close to the deal tell TMZ.

David showed up to the rehearsal studio a few minutes ago, to meet his partner for the first time.  We're told he's hooking up -- professionally, in a dancing sort of way -- with Kym Johnson.

The new season starts at the end of September.