Facebook Inc. today announced it has appointed Dropbox Inc. Chief Executive Officer Drew Houston to its board of directors.

Houston (pictured), who is said to be a close personal friend of Facebook founder and CEO Mark Zuckerberg, co-founded Dropbox in 2007 alongside his fellow MIT student Arash Ferdowsi.

As a member of Facebook’s board of directors, he’ll be tasked with advising Zuckerberg on a variety of matters. Even so, Zuckerberg has a controlling ownership stake in Facebook thanks to its dual-class stock structure, which means he still has the final say on pretty much anything of importance.

“Drew brings valuable perspective to our board as a leader of a technology company with services used by millions of people and businesses,” Zuckerberg said in a statement. “He thinks deeply about where technology is going and how to build a culture that delivers services that always work well.”

For his part, Houston said he’s looking forward to working with Zuckerberg and the rest of the board and that he sees “many opportunities and challenges ahead.”

Houston becomes the eighth member of Facebook’s board, which has seen a number of high-profile departures over the past year. Facebook’s independent lead director Sue Desmond-Hellman left the board in October, while Erskine Bowles, president emeritus of the University of North Carolina, and Reed Hastings, who is CEO of Netflix Inc., have also left in the last year.

Image: Facebook