Spike Lee, Wesley Snipes and Michael Jackson's trainer Lou Ferrigno were among the first celebrities to arrive at the memorial to the King of Pop in Los Angeles minutes ago.
TV stars Jaleel White and Elizabeth Berkley joined news woman Barbara Walters and moviemaker Tyler Perry on the black carpet outside the Staples Center.
Reports suggest Queen Latifah has been added to those adding personal messages to the ceremony - even though she couldn't attend the memorial. She has recorded a special tribute to Jackson, which will be aired at the event.