And the latest star to join the rainbow hair club is ... Lena Dunham! In need of a change, the Girls star traded in her platinum locks for something even bolder: a vibrant shade of green. She rocked the "newly minted" look while promoting her book, Not That Kind of Girl, in Toronto on Thursday, where she amped up the edge factor even further with a motorcycle jacket and winged-out liner. Though she’s no stranger to dramatic hair changes (she debuted a bowl cut right after wrapping up the hit show’s fourth season), this is certainly the most daring shade we’ve seen on her yet!
But Dunham isn’t the only celebrity to test out the hot hair trend as of late: Kate Hudson and her mother Goldie Hawn supported breast cancer awareness with a beautifully pink makeover earlier this week. Inspired to take the plunge?
PHOTOS: Check Out Our Favorite Wild Hair Colors Before You Hit the Salon
The singer sported her trendy new rainbow strands at the 2015 Teen Choice Awards.
The singer debuted her new light pink locks at the 2015 Teen Choice Awards.
Jenner recently shocked the Instagram world with her light blue locks.
Hilary Duff's mermaid-inspired makeover came just in time for the spring season.
The Mad Men star unveiled a subtle pastel hue on Instagram.
The singer hit the Grammys red carpet with a brand new lavender hue.
Richie, who was partial to cool tones (lavender and blue) in 2014, started the New Year with more color experimentation, switching to a vibrant pink nearly a week after going turquoise.
We were initially skeptical on whether or not the up-and-coming model's new baby pink hair was a wig. Seeing as Hadid credits iconic hair stylist Oribe as the master behind the look, we're inclined to believe it's the real deal!
Just two months after going blonde, Dunham went even bolder, captioning an Instagram snap, “Newly minted for the Canadian leg of the tour thanks to @tanneyb @rheannewhite.”
In honor of Breast Cancer Awareness Month, our July cover girl Kate Hudson, alongside mom Goldie Hawn and son Ryder, paid tribute to friends and family who have fought, or are currently batting the disease.
Polanco is the latest in line of celebs transitioning to the lilac hue, with the OITNB star opting for a daring gray-to-purple ombre.
Although Mirren is no stranger to hair transformations, the actress, who has been a stickler to her platinum shade for years, surprised viewers of the BAFTAs with cotton candy pink hair.
Rather than stick to one bold shade, Kesha went with several, hitting the 2014 VMA red carpet with My Little Pony-worthy hair.
Symone, who recently started a semester at San Francisco’s Academy of Art, marked the transition into student life with purple and green strands, Instagramming, “ My last Friday in la before I start my life as an #oncampus student! New hair for a new life!”
The True Blood star celebrated the end of the series with a bold new look: she switched up her golden locks in favor of a vivid violet shade mixed with blue highlights. "@Auracolorist just fulfilled my teen dream of being a mermaid," she tweeted.
Creative hair color pro Demi Lovato gave her natural brunette hue an amethyst tint with purple and grey ombre highlights.
Katy Perry switched up her blunt bob with a "slime green" dye job.
Kylie Jenner made a splash with a bright blue ombré hairstyle.
No stranger to pink hair, the style icon and natural blonde announced her return to cotton candy strands via Instagram.
Not one for drastic hair changes, Kristen Stewart unveiled a surprising orange hue for an upcoming film role.
The style maven took the plunge with a dusty pastel shade.
Shortly after giving lilac locks a try, Ireland Baldwin stepped out with an equally springy turquoise hue.
If anyone can channel Rainbow Brite on the red carpet, it's Kesha. The singer welcomed the spring season with a rosy, shoulder-length cut and a vibrant streak of green.
How did Demi Lovato kick off her Neon Lights tour? With a day-glo hair color, of course.
It's almost impossible to imagine the Paramore frontwoman without her edgy, citrus-inspired style.
Whether on the runway or off-duty, the model's funky, technicolor strands never fail to make a statement.
The fashion critic's now signature hair color varies from icy lavender to vibrant purple.