For the fashion-obsessed, an award ceremony is not about who wins the trophy, but who wore the best dress. On Sunday, the Screen Actors Guild Awards will present us with a fresh batch of honorable movie mentions and more importantly, red-hot red carpet looks. Before this weekend's SAG Awarads action kicks off, let's look back at the megawatt stars — and the gowns they wore — in retrospective detail. From Lupita Nyog'o eye-catching blue dress last year to Freida Pinto's lavender Marchesa  gown from 2009, we've got the infamous, the fabulous, and the truly unforgettable. Keep reading for our collection of the most memorable SAGs style moments.
— Additional reporting by Aemilia Madden
Jennifer Lawrence at the 2014 SAG Awards
Jennifer Lawrence turned things up a notch in 2014 in a shimmering Dior Haute Couture design.
Kerry Washington at the 2013 SAG Awards
No scandals here. Kerry's white, strapless Rodarte  gown was fit for royalty.
Marion Cotillard at the 2013 SAG Awards
Marion looked marvelous in a strapless blue-and-white gown from Dior.
Lupita Nyong'o at the 2014 SAG Awards
Lupita Nyong'o stood out in Gucci 's turquoise silk crepe column gown.
Freida Pinto at the 2009 SAG Awards
Freida Pinto wowed in a periwinkle-hued Marchesa  gown in '09. To accessorize, she wore Bally  heels and held a sweet Roger Vivier  clutch.
Anne Hathaway at the 2009 SAG Awards
Anne Hathaway  chose a white Azzaro  column gown and Christian Louboutin  pumps for the 2009 awards.
Hailee Steinfeld at the 2011 SAG Awards
Newcomer Hailee Steinfeld wore a colorfully striped Prada  gown in 2011.
Diane Kruger at the 2010 SAG Awards
Diane Kruger  nailed it in a vintage-inspired Jason Wu  gown in 2010.
Jessica Chastain at the 2012 SAG Awards
Jessica Chastain went for custom Calvin Klein  in 2012.
January Jones at the 2011 SAG Awards
Mad Men star January Jones  chose a black and gold Carolina Herrera  gown for the 2011 awards.
Sandra Bullock at the 2010 SAG Awards
Sandra Bullock  wore a streamlined Alexander McQueen  in 2010.
Claire Danes at the 2009 SAG Awards
Claire Danes  went bold in red in '09.
Michelle Dockery at the SAG Awards 2014
Michelle Dockery took the plunge in her dynamic J. Mendel gown.
Dianna Agron at the 2012 SAG Awards
Dianna Agron  complemented her fuchsia Carolina Herrera  gown with a braided updo.
Tilda Swinton at the 2012 SAG Awards
Tilda Swinton wore custom Lanvin  in 2012.
Kate Beckinsale at the 2008 SAG Awards
Kate Beckinsale  wore a canary-yellow strapless design in '08.
Jennifer Hudson at the 2007 SAG Awards
Jennifer Hudson  opted for a sultry, curve-hugging, embellished gown in '07.
Sofia Vergara at the 2014 SAG Awards
Sofia Vergara looked sultry in her curve-hugging Donna Karan  Atelier gunmetal sequined gown.
Kate Winslet at the 2009 SAG Awards
Kate Winslet  vamped it up in a body-con Narciso Rodriguez  gown in '09.
Angelina Jolie at the 1999 SAG Awards
Angelina Jolie  opted for an off-the-shoulder white gown back in her blond days in '99.
Natalie Portman at the 2011 SAG Awards
Natalie Portman  showed off her growing belly in a pretty Azzaro  gown in 2011.
Evan Rachel Wood at the 2009 SAG Awards
Evan Rachel Wood pulled off the Old Hollywood vibe effortlessly in a dark teal Monique Lhuillier  gown in 2009.
Angelina Jolie at the 2000 SAG Awards
Angelina Jolie  vamped it up in sheer black in 2000.
Kelly Osbourne at the 2013 SAG Awards
Now this is what a member of the fashion police looks like. Kelly Osbourne wore a black Jenny Packham  gown at last year's awards.
Diane Kruger at the 2007 SAG Awards
Diane Kruger , per usual, smoldered in an asymmetrical, shimmery gold gown in '07.
Emily Blunt at the 2009 SAG Awards
Emily Blunt  chose a slinky, silver sequined gown in 2009.
Ellen Pompeo at the 2008 SAG Awards
Grey's Anatomy star Ellen Pompeo  wore a sculpted, strapless silver dress from designer Nina Ricci  with Christian Louboutin  peep-toe pumps at the 2008 SAG Awards.
Jennifer Lawrence at the 2011 SAG Awards
The Hunger Games star chose a shocking pink Oscar de la Renta  gown to walk the 2011 awards' red carpet.
Charlize Theron at the 2004 SAG Awards
Charlize Theron  stunned in lilac in 2004.
Kate Hudson at the 2001 SAG Awards
Kate Hudson  chose a strappy little dress and a flower for her hair in 2001.
America Ferrera at the 2008 SAG Awards
For the 2008 awards, America Ferrera  slipped into a charcoal-gray Monique Lhuillier  gown — and we're totally in love with the lacy, jeweled one-shoulder detail. To finish the look, she wore Jimmy Chool heels.
Chloë Sevigny at the 2000 SAG Awards
Chloë Sevigny  showed off a bright floral print on the red carpet in 2000.
Kerry Washington at the 2014 SAG Awards
Kerry Washington stood out in a two piece Prada  outfit.
Kate Hudson at the 2010 SAG Awards
Kate Hudson  went totally sexy — and backless — in Pucci at the 2010 awards.
Halle Berry at the 2003 SAG Awards
Halle Berry  went for a perky pink with a sexy neckline in 2003.
Kate Winslet at the 2001 SAG Awards
Kate Winslet  suited up in a leather halter (that reminded us of an Angelina Jolie look ) in 2001.
Catherine Zeta-Jones at the 2004 SAG Awards
Catherine Zeta-Jones  went glam in gold in '04.
Emma Stone at the 2012 SAG Awards
Emma Stone  channeled Old Hollywood glamour in Alexander McQueen .
Demi Moore at the 2007 SAG Awards
Demi Moore  opted for a rich blue hue in '07.
Cate Blanchett at the 1999 SAG Awards
Cate Blanchett  looked absolutely ethereal in a ladylike, lacy sheath in 1999.
The Cast of Sex and the City at the 2001 SAG Awards
The ladies of Sex and the City, Cynthia Nixon, Kim Cattrall , Sarah Jessica Parker , and Kristin Davis, showed off their individual style — and, for SJP, her supertoned abs — at the SAG Awards in '01.
Amy Adams at the 2009 SAG Awards
Amy Adams  wore a ruffled strapless gown for the awards in 2009.
Sarah Jessica Parker at the 2003 SAG Awards
Sarah Jessica Parker  went black and white with a pop of red in 2003.
Debra Messing at the 2008 SAG Awards
Debra Messing  worked a gold column dress and dramatic neckline in 2008.
Keri Russell at the 2002 SAG Awards
Keri Russell  kept it minimalist, plus a bold red lip, in '02.
Angie Harmon at the 1999 SAG Awards
Angie Harmon kept it simple in a floor-length halter gown in '99.
Amy Adams at the 2006 SAG Awards
Amy Adams  went quirky-chic in 2006 in a bow-tied, sheer black gown.
Jessica Chastain at the 2013 SAG Awards
Jessica's bright red strapless gown, created by Alexander McQueen , looked great with her red hair — and even better against last year's red carpet.
Liv Tyler at the 2004 SAG Awards
Liv Tyler  went for bold color in 2004.
January Jones at the 2008 SAG Awards
January Jones  showed off her affinity for bold red carpet gowns in 2008.
Cameron Diaz at the 2002 SAG Awards
Cameron Diaz  got flirty in black at the awards in 2002.
Reese Witherspoon at the 2006 SAG Awards
Reese Witherspoon  was sweet and chic in black and white at the 2006 awards.
Meryl Streep at the 2010 SAG Awards
Meryl Streep  was one of our favorites in 2010 — color-injected and totally chic.
Stacy Keibler at the 2012 SAG Awards
Stacy Keibler, pictured with George Clooney , opted for a black Marchesa  number.