The actor, who has turned gay rights activist, wants the President to reverse the law banning same sex marriages in US, the ‘Contactmusic’ reported.

"Eventually we are hoping for a White House screening. I think this film will be one of the steps forward (in the fight for gay marriage). It will be part of the dialogue. But I think things are going to go forward with or without it," the actor said.

"I was once asked to tell the difference between luxury and necessity for a human being. The right to equality for all, including homosexuals, is of course a necessity.

"That's why this right will become a reality and I think in its own way this film will be part of that," said the actor, who has won the Best Actor Oscar trophy twice.

Penn had also made a similar appeal while accepting the Academy award on February 22 this year, extolling anti-gay-rights protesters to rethink and change their views on the issue.