Comedian Bill Cosby, right, is congratulated by his TV co-stars from "The Cosby Show," Malcolm-Jamal Warner, left, and Phylicia Rashad, after receiving the Mark Twain Prize for American Humor in Washington, Monday, Oct. 26, 2009. (AP Photo/Jacquelyn Martin)

Malcolm Jamal Warner attends the the launch of the new sitcom 'Sherri' at the Empire Hotel. New York, USA - 05.10.09

NEW YORK - OCTOBER 05: The Sherri Cast - Elizabeth Regen, Kali Rocha, Malcolm-Jamal Warner, Lifetime CEO and President Andrea Wong, Sherri Shepherd, Kate Reinders and Tammy Townsend attend the Launch Party for new sitcom "Sherri" at the Empire Hotel on October ...

Malcolm Jamal Warner arrives at the New York Film Festival premiere of "Precious" at Alice Tully Hall at Lincoln Center in New York on October 3, 2009. Sharon Neetles/Globe Photos, Inc.