"Facebook’s Mark Zuckerberg to Keynote on Sunday, March 9 Mark Zuckerberg SXSW Interactive is pleased to announce Facebook’s founder and CEO, Mark Zuckerberg, as the keynote presentation on Sunday, March 9 at 2:00 PM. Sarah Lacy, author, BusinessWeek columist and co-host of Yahoo Finance’s “TeckTicker” will host the on-stage interview with Zuckerberg, the 23-year-old who has emerged as one of the brightest young minds in the booming social media industry."