SAG Awards 2012: Best and worst dressed
"The Help" star was a knockout in a white, Grecian gown by Marchesa with gold detailing at the bodice.
The actress looked elegant in a black, tea-length number with a lace bustier from Alexander McQueen, paired with shoes and a handbag also from the designer.
The "My Week with Marilyn" star was a hit in a red Valentino gown with lace sleeves and an asymmetrical skirt.
"The Help" star popped on the red carpet in a deep blue column gown by Calvin Klein that complimented her red hair.
The "Glee" star wowed in a gray Versace gown with a thigh-high slit.
The actress stood out in a berry-hued, backless gown from Temperley London.
Like her "Modern Family" co-star Julie Bowen, Vergara opted for a berry-colored dress for the SAG red carpet. Hers is a curve-hugging raspberry gown by Marchesa.
The actress (there with her husband, "The Office" actor John Krasinski) was another standout in a bold color, donning a jade-hued Oscar de la Renta gown.
The actress was just one of the stars who wore black on the red carpet. Hers is a backless metallic number by Jenny Packham, paired with gold jewelry.
George Clooney's girlfriend walked the red carpet in a black lace gown by Marchesa.
"The Help" star continued her awards season love affair with Tadashi Shoji (she also wore the designer to the Golden Globes) in a sparkling, draped silver number.
Saldana shined in white Givenchy Haute Couture by Riccardo Tisci, with a sheer overlay and jeweled neckline.
"The Closer" actress wowed in a sultry red Emilio Pucci dress with side cutouts.
Walking the red carpet on the arm of her "Boardwalk Empire" beau Vincent Piazza, Simpson was a standout in a black, sparkly Jenny Packham number that channeled Old Hollywood.
The "Glee" actress was among the stars who donned pale hues with positive results, wearing a shimmery gown with a plunging neckline by Naeem Khan.
The riskiest choice of the night came from "Bridesmaids" star Rose Byrne, opted to wear pants on the red carpet by way of a white, beaded Elie Saab jumpsuit. It's something fashion fans with either love or loathe.
The "Bridesmaids" star would have been among the night's best dressed for her Balenciaga halter dress, but the bondage-inspired choker she paired it with ruined the whole look.
"The Descendants" star was another miss, in a floral patterned L'Wren Scott frock that looked better suited as a tablecloth or curtains.
The actress' Antonio Berardi gown had an odd-looking peach and gold breastplate that made the choice a miss.
The "Cougar Town" star's patterned Simone gown looked better suited for the beach than the red carpet.
The "Bridesmaids" star arrived at the 18th Annual Screen Actors Guild Awards in a lackluster, two-toned ensemble.
There's way too much going on in this "Glee" star's ensemble - from the leather panels and the sheer skirt to the silver heels she paired it with, it all was a miss.
Another "Glee" star made a fashion miss - this actress' black and white dress had a giant bow splashed across her chest.
"The Big Bang Theory" star's Ramona Kaveza gown with a feathery skirt was the wrong color - a mint green - and it didn't work with the chunky, Heidi braid she had going across her head.