Gia Coppola

At the Palo Alto premiere during this year's Tribeca Film Festival, Gia Coppola looked as polished as ever in a perfectly tailored suit  by Saint Laurent. 

Emma Stone

While promoting her upcoming film, The Amazing Spider-Man 2, in London, the actress exchanged her usual red-carpet gown for a gray plaid suit by Saint Laurent, which we loved.

Emma Watson

While Emma Watson was already killing it on her red-carpet press tour for the film Noah, she knocked it out of the park in a Saint Laurent suit when she stepped out for her appearance on Late Show With David Letterman. And that red lipstick? It was the perfect finishing touch for her grown-up look.

Angelina Jolie

Want to know how to properly wear a lady tux? Take note of Angelina Jolie's sexy getup at this year's BAFTA Awards, which was designed by Saint Laurent. Absolute perfection.

DRESS DU JOUR: Angelina Jolie's BAFTAs Tux

Carey Mulligan

During her Great Gatsby press tour, the actress was spotted wearing pantsuits on a few occasions — and this winning outfit was from Lanvin's spring 2013 collection.

Olivia Wilde

The new mother, who gave birth to her first child on Wednesday, turned heads at the London premiere of Rush when she walked out in a Gucci outfit with a plunging neckline. What a babe.

Beyonce

The Osman jumpsuit worn by Beyonce at the 2013 Grammys was flawless and accentuated the superstar's perfect curves.

Blake Lively

During an appearance on Good Morning America, the Age of Adeline actress went for a bold red suit designed by her pal Michael Kors. 

Cate Blanchett

At the 2010 Tony Awards, the Blue Jasmine actress arrived in a sparkly silver stunner from Giorgio Armani Prive. Designer Giorgio Armani said of the actress and her style throughout the years: "She takes risks, picks adventurous designs and has created an iconic style of her own. In my book, Cate has cemented a place for herself on the eternal best-dressed list."

Gwyneth Paltrow

Before Gwyneth Paltrow shocked the world in her Antonio Berardi-designed, sheer-paneled gown at the Iron Man 3 premiere, she covered up in one of our favorite outfits — the red Tom Ford pantsuit she wore to the 1996 MTV VMAs.

Amy Poehler

At the 2013 Golden Globes, the Parks and Recreation actress went for a sexy Stella McCartney tuxedo suit.

Chloe Grace Moretz

The Movie 43 actress showed off her sophisticated side in a Dolce & Gabbana piece at her film's premiere. 

Victoria Beckham

Stepping out with husband David Beckham for The Global Fund and British Fashion Council party, Victoria Beckham wore a flattering black suit made by Burberry.

Diane Keaton

As someone known for dressing in menswear-inspired attire in years past, Diane Keaton continued her style tradition at this year's Oscars with a suit and tie.

Evan Rachel Wood

Evan Rachel Wood is the definition of cool, especially when she arrived to this year's Art of Elysium gala in a shiny red Moschino Cheap + Chic blazer and slim-fit pants.

Florence Welch

If there's anyone who can pull off a patterned pantsuit, it's Florence Welch. The Florence and the Machine frontwoman wore a floral '70s-inspired piece by Moschino for the NME Awards in 2012.

Jaime King

Talk about fierce. At the 2013 MET Gala, Jaime King stunned in a satin Topshop pantsuit. 

Janelle Monae

The R&B singer, known for her signature style of tuxedo suits, looked completely cool and chic at the 2011 Grammys.

Jessica Biel

While attending the Runner Runner premiere to support husband Justin Timberlake, the actress wore a double-breasted, tailored Dolce & Gabbana suit that featured satin shawl-collar lapels and diamond-encrusted buttons. What a way to work the red carpet.

Nicole Kidman

At the Railway Man premiere during the 2013 Toronto Film Festival, Nicole Kidman stunned in a flattering Altuzarra suit with pretty lace details on the blazer.

Rita Ora

Rita Ora made a bold statement in her Burberry suit, which she styled with a loose T-shirt and white wedges, before taking a seat at the British brand's runway show in 2013.

Robin Wright

Robin Wright — whose rule for the red carpet is to get ready in 30 minutes or less — kept it classy in a black-and-white ensemble for the House of Cards premiere in D.C.

Zoe Saldana

Zoe Saldana was a winner in a white Lanvin suit at the 2013 Niche Media party.

Scarlett Johansson

Scarlett Johansson was flawless in a Christian Dior ensemble for this year's Cesar Awards, where she was given an honorary award. What else did we notice on the Her actress during her time on the red carpet? Her gorgeous engagement ring from fiance Romain Dauriac.

Jane Fonda

Although Jane Fonda has appeared in pantsuits on the red carpet over the years, her outfit at the 1979 Golden Globes will always hold a special place in our hearts.

Katharine Hepburn

If there was an old Hollywood star who really mastered the pantsuit look, it was most certainly Katharine Hepburn, who always knew how to rock a pair of khaki slacks with a matching jacket, turtleneck and loafers.

Bianca Jagger

No one had more style swag than Bianca Jagger in the '70s. We still can't stop swooning over the iconic YSL "le smoking" suit she wore in 1979.

Julia Roberts

 The Money Monster actress chose a pinstripe suiting option by Givenchy at the film’s photocall during the 2016 Cannes Film Festival. 

Lena Dunham

The Girls creator and star borrowed from the boys at the Arts Connection 2016 Benefit Celebration in May of 2016.

Charlize Theron

The Last Face actress stepped out in a Dior Couture tuxedo and Cartier diamond necklace at the film’s premiere during the 2016 Cannes Film Festival. 

Allison Williams

The Girls star made an impact at the Tony Awards in a custom DKNY suit on June 12, 2016 in New York City.

Serayah

The Empire actress took a sexier approach in a ruffed white crop top and high wasted slacks by Cushnie et Ochs in a The 2016 Women In Film Max Mara Face Of The Future celebration hosted by Max Mara at Chateau Marmont on June 14.

Emily Ratajkowski

The model-turned-actress donned a mustard-hued crushed velvet suit by Roberto Cavalli at The 2016 Women In Film Max Mara Face Of The Future celebration hosted by Max Mara at Chateau Marmont on June 14.

Natalie Dormer

The evening’s honoree wowed in a white jumpsuit at the a The 2016 Women In Film Max Mara Face Of The Future celebration hosted by Max Mara at Chateau Marmont on June 14.