Jesse Eisenberg (born October 5, 1983) is an American actor best known his roles as Facebook co-founder Mark Zuckerberg in the 2010 drama film The Social Network, James Brennan in the 2009 period piece comedy-drama film Adventureland co-starring Bill Hader and Kristen Wiig, Columbus in the 2009 zombie comedy film Zombieland and for voicing Blu in the 2011 animated musical comedy film Rio. He hosted Saturday Night Live on January 29, 2011 and made a cameo on February 5, 2011 during the "Deidra Wurtz: Downsizing Expert" sketch.