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Steve Carell, Olivia Wilde and Jim Carrey

Actors Steve Carell, actress Olivia Wilde and actor Jim Carrey speak on stage at the world premiere of "The Incredible Burt Wonderstone" during the 2013 SXSW Music, Film + Interactive Festival at the Paramount Theatre on March 8, 2013 in Austin, Texas.

SXSW 2013: Celebrity Sightings

Rockstars, actors, Internet phenoms, oh my! Celebrities by the droves have descended upon Austin's annual South By Southwest festival as the music leg kicks off this week. Check out the who's who on the stage, walking the red carpet, or partying it up at one of the zillion shows.