“Girls” creator Lena Dunham, horror maven Jason Blum and YouTube favorite Casey Neistat have been selected for keynote addresses at next year’s South by Southwest Film Conference and Festival.

It’s the second expansion announced by the festival, following the addition of a sports section with Mandalay Sports Media’s Peter Guber and ESPN’s Bill Simmons and Nate Silver in conversation.

“Though our conference has long featured dynamic speakers, we’re kicking it to a new level this year,” said festival topper Janet Pierson. “By adding a daily Keynote, we aspire to further highlight and draw all eyes to creators who impact our culture in diverse and fascinating ways. Our first three keynotes epitomize the root of what SXSW Film stands for: singular vision, DIY creation, and gleefully coloring outside the established lines.”

Dunham premiered her breakthrough film “Tiny Furniture” at the fest three years ago.

SXSW also unveiled its first panels for the 2014 festival, including “Building a Social Media Duck Dynasty” presented by Elizabeth Lloyd of A&E Networks.

The festival, which celebrates the interactive, music and film mediums, will take place March 7 to 16 in Austin, Texas.