Dancing With The Stars has sunk to....

A new low by having Cloris Leachman on. She's too OLD, too SLOW and way to foul mouthed.

Here's what one critic says:

Cloris Leachman: Teamed with dancer Corky Ballas (Mark's dad), I'm told they are having a lot of fun together during rehearsals. She will pull in the grandma vote, and they are mighty.

UGH!