Since it's impossible for the actress, 22, to grow out her 'do that quickly, we're assuming that her super-sized mane is either a wig or tons of individual extensions.
It comes as no surprise that Hudgens added several inches to her brunette strands. "Oh man, it's really intense -- I'm still getting used to it," she told Access Hollywood last month about her radical hair makeover. "Honestly, I kind of feel like a soccer mom, but we're going to let that go. There's nothing wrong with soccer moms, but I'm only 22! I miss [my hair,] believe me, I do, but there's nothing I can do about it."
The High School Musical alum didn't hit up a pricey salon or enlist a celebrity hairstylist to cut her hair for the movie.
"I grabbed the scissors and started cutting my actual hair," she said. "Then my director decided that he was going to grab the scissors, and he grabs a chunk of my hair and just chops it."
In the upcoming drama film (due out in 2012), Hudgens plays a pregnant teenager who is forced to live on a city's downtrodden streets. She'll star opposite Brendan Fraser and Rosario Dawson.