Actors Josh Brolin and Jeffrey Wright were arrested during the early hours of Saturday morning after a fight in a bar in a Louisiana city, police said.
Sergeant Willie Lewis said the pair, who star in Oliver Stone's new film about George W Bush, were held along with five other people in Shreveport.
Officers would not confirm whether Mr Brolin or the others had been released. The Times of Shreveport newspaper said the others arrested were also working on the film, called W.
Filming began in May.
Mr Brolin, who has also starred in American Gangster and No Country for Old Men, plays President Bush.
Wright, best known for playing Felix Leiter in the last two James Bond films, plays former Secretary of State Colin Powell.
Elizabeth Banks, James Cromwell and Thandie Newton also star in the film.
W is Stone's third presidential film, following Nixon and JFK.
He also directed the Vietnam sagas Born on the Fourth of July and Platoon, which won four Oscars including best picture and director.
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