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Tom Hanks, Halle Berry launch "Cloud Atlas" at L.A. premiere

Tom Hanks and Halle Berry were among the stars who stepped out for the premiere of "Cloud Atlas" at Grauman's Chinese Theater in Los Angeles on Wednesday night.

Berry, wearing a silver Dolce & Gabbana dress, was joined by her fiance, French actor Olivier Martinez.

Also seen on the red carpet were Susan Sarandon, Keanu Reeves, Jim Broadbent, James D'Arcy and Jim Sturgess.

The film, budgeted at an estimated $100 million, focuses on relationships over hundreds of years, starting in 1849 all the way to the 24th century. Clocking in at nearly three hours, "Cloud Atlas" is based on David Mitchell's best-selling novel of the same name.

"You have to say yes to something like this," Berry said at the premiere, reports USA Today. She said she hopes audiences "walk away having a dialogue about it. And really realizing the ramifications of all of our actions and all of the choices that we make, and that they do reverberate for generations and generations. Acts of kindness and also acts of cruelty. It really matters."

"Cloud Atlas," which had its world premiere at the Toronto Film Festival last month, opens on Friday.