Natalie Portman was back to work — and showing off her new blond locks — on set with Holly Hunter yesterday in Austin. The ladies were busy shooting the latest picture from director Terrence Malick, which is as yet untitled. Natalie's been in Texas for the last week logging time with her husband, Benjamin Millepied, and their son, Aleph. On Monday, the trio, along with the family dog Whiz, went to the Congress Avenue Bridge to see bats taking their nightly flight. Natalie's focusing on filming in the Lone Star State after finishing Knight of Cups in LA. She's got quite a roster of projects coming up, with Thor: The Dark World and Jane Got a Gun in preproduction.