Birthday invitation.

Director Spike Lee is sponsoring a public birthday celebration for Michael Jackson in Prospect Park, New York on Saturday.

The party, which is expected to draw a crowd of more than 10,000, will be held in the Nethermead meadow in Prospect Park, NY from noon to 5pm.

Organizers say the party will go on despite the rainy weather and possible thunderstorms.

DJ Spinna will be playing Jackson hits, from the Jackson 5 to the Jacksons to Michael Jackson.

According to New York Times Rev. Al Sharpton will say a prayer at the party. President Marty Markowitz will present a proclamation declaring August 29 Michael Jackson Day in Brooklyn.

The bash was originally was planned for Fort Greene Park but was moved following predictions of a big crowd. An initial crowd of 2,000 was expected.

Jackson would have turned 51 on August 29.