Jennifer Lawrence is a big star  and now she has big hair to go with it.

The 22-year-old Hunger Games actress is now sporting blonde hair which has been styled into a 1970s-style bouffant for her new film.

Jennifer  who won Best Actress last month for Silver Linings Playbook  is filming a currently untitled film co-starring Bradley Cooper, Christian Bale, Jeremy Renner, and Amy Adams about a '70s sting operation to take down a U.S. Senator.

Along with the amazing updo, Jen was wearing a plaid shirt and black jacket.

We wonder what Katniss would say about such an elaborate 'do?

Source: Us Weekly