Obama stopped by a private White House meeting Monday with celebrities including singer Jennifer Hudson and actors Amy Poehler, Michael Cera and Kal Penn.
The White House says the artists expressed interest in helping spread the word about the health insurance marketplaces opening Oct. 1.
The White House says Obama told the artists they could help reach young uninsured Americans who will be vital to his signature law's success. Insurers need healthy young customers to help offset the costs of older, sicker consumers.
The group also included representatives for Oprah Winfrey, Alicia Keys and Bon Jovi. Also in attendance were officials with internet video makers YouTube and Funny or Die, which are teaming up on promotions featuring comedians.