The Comedy Central Roast of Roseanne will record the programme on Saturday, August 4 in Los Angeles and broadcast it on Sunday, August 12 on Comedy Central.
Each year, the cable network selects a worthy celebrity to be honoured on their show by getting roasted by their celebrity friends.
Since its 2003 debut, Comedy Central has roasted celebrities Denis Leary, Jeff Foxworthy, Pamela Anderson, William Shatner, Flavour Flav, Bob Saget, Larry the Cable Guy, Joan Rivers, David Hasselhoff, Donald Trump and Charlie Sheen.
The special on Sheen, who can be seen on his own show Anger Management, drew a franchise record of 6.4 million viewers.
Barr was set to appear on her pilot Downwardly Mobile on NBC, but the network did not pick it up.
Watch a clip of Charlie Sheen's Comedy Central Roast below: