E! News said Sheen's appearance came during Kimmel's interview with HDNet owner Mark Cuban Monday night. Cuban has said in the past he and Sheen are looking for a project to work on together.
During Cuban's chat with Kimmel, Sheen appeared onstage, kissed the talk-show host on the lips and handed out to the cheering audience T-shirts with some of his favorite expressions such as "winning" and "tiger blood," E! News said.
"I can't stay, sorry," Sheen told Kimmel and his viewers. "I have a show to write, dammit!"
Sheen, who recently was fired from TV's "Two and a Half Men" because of his erratic behavior, has announced plans for a touring stage show. Dates in New York, Boston, Detroit and Chicago have already sold out.
DISCUSS AND COMMENT ON THIS STORY Reality TV World now offers Facebook Comments on our stories. To post a comment, log into Facebook and then 'Add' your comment. To report spam or abuse, click the 'X' in the upper right corner of the comment box.