The Democratic National Convention will be hosting some big Hollywood stars on Thursday night, Sept. 6, to work up the crowd before President Barack Obama takes stage.  

The "Black Swan" actress Natalie Portman will speak on Thursday night in Charlotte, N.C., and so will fellow actresses Scarlet Johansson and Kerry Washington, according to CNN.

The Foo Fighters will perform at the convention and then the actresses will appear together center stage to speak to the audience before President Obama is introduced.

Wednesday's convention also had some Hollywood starlets thrown into the mix of politicians and delegates present at the event. Olympic gold medalist Gabby Douglas led the Pledge of Allegiance at the beginning of the evening session.

Representatives for Johansson and Portman did not comment on the appearance reports, although CNN confirmed that they obtained a schedule of the evening's events. Washington said that she is filming in Los Angeles at the present time, however, she did not deny a scheduled appearance. Democratic officials declined to confirm whether or not the elite actresses would be appearing.

Portman's decision to support President Obama was partially based on decisions that would benefit women, the actress said. At a rally in Las Vegas, she spoke about the Lily Ledbetter Fair Pay Act, which ensures equal pay for equal work, and Obama's healthcare plan, according to the Christian Post.

"We would go back to the days where being pregnant is a pre-existing condition," Portman told the Las Vegas Review-Journal. "I think the thing that is most upsetting in the past four years is how partisan [the Republican party has] been in blocking Obama's reforms. All of us should be putting our country first."

Portman is married to dancer and choreographer Benjamin Milepied, whom she met on the set of "Black Swan." Together they have a son, Aleph.

Watch the final night of the DNC on Thursday, Sept. 6 beginning at 8 p.m. Eastern Time. Live streaming of the event is available at www.demconvention.com.