Lena Dunham's
ready for a change!

The "Girls" star debuted her new blonde bowl cut over the weekend via Instagram.

In one photo, Lena poses with her arm over her head as she stares into the camera with her lighter locks on display. "Change is good," she captioned the candid snap.

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In a second pic, the actress posed with a few of her girlfriends at a pal's wedding. "2 sets of sister-friends, 23 years strong. Jersey got married in yellow," she posted with the photo.

The blonde color and bowl cut is definitely a cute change for the 28-year-old -- maybe she got her hair inspiration from Sia? The two performed the singer's hit single "Chandelier" on "Jimmy Kimmel Live" earlier this year.

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Dunham also took part in the ALS Ice Bucket Challenge on Sunday, and nominated her "Girls" costars Allison Williams, Zosia Mamet and Andrew Rannells. "They got me with that Ice Bucket Challenge," she captioned the video.

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What do you think about Lena's new 'do? Sound off below and click "Launch Gallery" above to see more stars who've gone blonde or brunette!

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