Katherine Heigl's Changing Looks

The budding beauty played cello at New Canaan High School in Connecticut.

The up-and-coming star of Under Siege 2: Dark Territory went with a ‘60s-inspired updo and frosted lips.

The starlet hit the premiere of Final Destination with long blond locks.

€She looks cool and vampy with a bob, hairstylist Campbell McAuley has said of her Roswell look. Almost like Catwoman in Batwoman.

The actress promoted Roswell with an even shorter crop.

Blond again, Heigl hit it big with both Grey's Anatomy and Knocked Up.

Her dress had an art deco feel, so we did bold, smoky eyes to match, makeup artist Mai Quynh said of Heigl'€™s Emmys look.

At the Screen Actors Guild Awards, the 27 Dresses star turned up the heat with head-to-toe glamour. "I love vintage," Heigl says. "I keep going Old Hollywood in everything I do."

€œWe called this the Roman retro look, makeup artist Monika Blunder said of Heigl'€™s Oscars look. The coral lips made everything pop.

"It's hard to find different updos that are flattering and not just the same thing every time," the The Ugly Truth star has told InStyle. This banded style made the grade.

Newly brunette, Heigl completed her last season of Grey’s Anatomy and starred in The Killers with Ashton Kutcher.

Back to blond, the new mother played a, well, new mother in Life As We Know It.

Heigl hit the premiere of One For the Money with her butter-blond hair in a sleek updo.

Heigl opted for bold but natural curls and a shiny pink lip at the Kari Feinstein Style Lounge in Park City, Utah.

The actress wore her strands sleek and straight and paired them with a minimal smoky eye at the NBC & Vanity Fair 2014 – 2015 TV season event in West Hollywood, Calif.

Heigl styled her long hair in loose curls at the 72nd annual Golden Globe Awards and wore a light bronze eye shadow and shiny lip.

Mom-to-be Heigl was glowing on the red carpet.