Chris Rock says a double-bill comedy tour with Dave Chappelle "could happen."

Rock's tweet responded to a HumorMillMag.com post that said he and Chappelle have been "working out" material at a New York comedy club, in preparation for a joint comedy show. If that show goes well, the two may plan a joint comedy tour.

Chappelle has performed throughout 2011, but Rock hasn't focused on stand-up since his 2008 Emmy-winning HBO comedy special "Kill the Messenger."

The two worked together in 2003, when Rock made a guest appearance on Chappelle's Comedy Central sketch comedy series "Chappelle's Show."

By Kimberly Potts | Reuter