Hayden Panettiere apparently is not yet done experimenting with her hair. After ditching her signature blonde locks for a deep red color weeks prior, the 20-year-old actress has gone blonde once again but presented another dramatic change as she chopped her long hair extra short, debuting a boyish look.

The Claire Bennet of "Heroes" showed off her new hairdo at the Global Home Tree Earth day event in Los Angeles last Thursday, April 22. Hitting the green carpet in the arm of her boxer boyfriend Vladimir Klitschko, she was seen setting her short hair slicked back with sideburns pulled down in front of her ears.

Before cutting it short, Hayden dyed her hair red back in January. On the reason why, she explained to Us Magazine at the time, "I was tired of being a blonde. You get stuck in one thing and known for one thing... It's fun to change things up, and I feel I don't have to overcompensate as much personality-wise when I have red hair as I do with blonde hair."