According to TheLAScene

BREAKING NEWS! Eclipse premier WILL be on June 24, 2010 at GRAUMAN’S CHINESE THEATER on Hollywood Blvd.

We have found confirmation from Hollywood Chamber of Commerce that the event is taking
place on this date at this location.

Hollywood Boulevard will be completely closed between Highland Avenue and Orange Drive from
Thursday, June 24 at 12:15 am through Friday, June 25 at 5:00 am.

From: TwiExaminer

Ahem. Regarding the #EclipsePremiere news, just got word from Summit that the location of the premiere is still to be determined.

Via Source