Leighton Meester's Changing Looks

"I was a late bloomer," Meester has said of her time at Beverly Hills High School.

The natural blonde scored a small role on the short-lived TV version of Tarzan.

Meester played a pop star on Entourage and experimented with red hair and even redder lips.

She went dark to star as queen bee Blair Waldorf on Gossip Girl.

Meester opted for tousled waves at the Tribeca Film Festival.

Makeup artist Chris Colbeck highlighted her baby browns with silver shadow. "I'm an eyes man," he says. "It's all about the eyes."

Bold bangs and a beauty trick from Chris Colbeck: "I painted her eyes with Victoria's Secret LipLacquer in True and used a MAC eyeliner in Teddy on the inside of her eyes."

Meester graced the Spring cover of InStyle Hair with voluminous waves.

Meester chose ruby red lipstick for the Emmys.

Along with reprising her role on Gossip Girl, Meester plays a babysitter in the Tina Fey flick, Date Night, and will release her first album, Love is a Drug.

She went seductively ombre for the MTV Movie Awards.

Meester complemented her creamy complexion with newly-auburn locks.

Meester sported lightened locks at the L.A. premiere of That's My Boy.

After wrapping up Gossip Girl, Meester gave her signature Blair Waldorf strands the chop, courtesy of on-set hairstylist Lizzie Reilly. "My long, wavy hair got a lot of mileage, so it was time for a change," the actress told Just Jared. "I hop out of the shower and it takes five minutes to dry!"

Meester kept her makeup au naturel and rocked loose beach waves while attending the premiere for Like Sunday, Like Rain in Mill Valley, Calif.

With her hair styled in relaxed waves and with a subtle smoky eye, Meester arrived at a benefit in Los Angeles looking fresh-faced.

Meester went blonder for the Fox 2016 upfronts, styling her "bronde" hair into loose tendrils.

The actress showed off even blonder locks and a new set of bangs at an event in West Hollywood.