Paris Hilton at LA Jackson premiere

Paris Hilton, Katy Perry, Jennifer Lopez and Will Smith were among the A-list celebs who secured themselves a front-row ticket for the Los Angeles premiere of Michael Jackson's This Is It.

An array of stars, which also included Jennifer Love Hewitt, Paula Abdul, Smokey Robinson, Sugar Ray Leonard, Vivica A. Fox and Zac Efron, crammed on to the red carpet outside the Nokia Theatre in LA to be among the first to see the film.

Tito, Marlon, Jackie and Jermaine Jackson represented their brother Michael on the wind-swept red carpet, shaking hands with fans and chatting to many of the stars as they arrived.

Many of the dancers, singers and band members who feature in the film's rehearsal footage also took time out to chat with reporters ahead of the big screening.

Dancer Daniel Celebre said fans are in for a rare treat.

"We have to remember this is rehearsal, I think it's going to be so beautiful for people to understand his process. Every movement he had - rehearsing or not - was phenomenal," he said.

Vocalist Ken Stacey said the rehearsal process had been intense.

"We were putting in at the height six days a week, 12 hours a day, wanting it to be perfect for Michael because he wanted it perfect for the world."

Dancer Tyne Stecklein told reporters the King of Pop's death had shocked the whole cast, saying: "It was devastating, we were at rehearsals with Michael the night before until midnight, he looked incredible every day he was with us, it was such a shock."