RANCHO PALOS VERDES, Calif. - Silicon Valley's top leaders are gathering tonight for the start of the All Things D conference, which brings together the technology world's biggest names annually.

The conference is kicking off with a very big interview. Apple CEO Tim Cook will sit in the hot seat and answer questions from conference executive producers Walt Mossberg and Kara Swisher. Will he talk about the rumors around the next version of iOS? Or those Macs that are going to be made in America? How about the rumored smartwatch?

Tune at 6 p.m. PT / 9 p.m. ET for live updates from the conference. Check back here for updates.

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