Chris Warren Jr is a GBK Guy

Chris Warren, Jr. cozies up to his mom Brook Kerr as they attend GBK’s Pre MTV Pool Party in Los Angeles on Friday afternoon (May 29).

The 19-year-old High School Musical hunk will star in the upcoming Alvin and the Chipmunks: The Squeakquel as Xander. The flick, due out Christmas Day 2009, will introduce the Chipettes into Alvin, Simon and Theodore’s lives.

Fun fact about Alvin: Jesse McCartney voices Theodore.