Justin Timberlake: Normally dapper in a Tom Ford tux, Timberlake showed up looking like he was ready for a cameo appearance on “The Hour.”

Photos: Screen Actors Guild’s style

Jennifer Lawrence After wearing a gown with a bizarre bustline to the Golden Globes, the “Silver Linings Playbook” actress stunned in a tiered navy gown from Dior Couture. And no, the dress did not malfunction.

Jennifer Lawrence: After wearing a gown with a bizarre bustline to the Golden Globes, the “Silver Linings Playbook” actress stunned in a tiered navy gown from Dior Couture. And no, the dress did not malfunction.

KEVORK DJANSEZIAN/GETTY IMAGES |

Jessica Lange We’re always rooting for the “American Horror Story” star who won outstanding performance by a female actor in a drama series. After many sartorial flops, she finally shined in a J.Mendel gown.

Jessica Lange: We’re always rooting for the “American Horror Story” star who won outstanding performance by a female actor in a drama series. After many sartorial flops, she finally shined in a J.Mendel gown.

FRAZER HARRISON/GETTY IMAGES |

Nicole Kidman Another winner in navy, Nicole Kidman’s Vivienne Westwood Couture dress offered a hint of sexiness with peek-a-boo details and a bit of leg. Her breezy styling balanced the elaborate beading.

Nicole Kidman: Another winner in navy, Nicole Kidman’s Vivienne Westwood Couture dress offered a hint of sexiness with peek-a-boo details and a bit of leg. Her breezy styling balanced the elaborate beading.

ALBERTO E. RODRIGUEZ/GETTY IMAGES |

Sofia Vergara Thewhite liquid lame gown marks a turningpoint for the “Modern Family” actress. The dress may not have been ideal, but at long last the focus was on the dress rather than her décolletage.

Sofia Vergara: The white liquid lame gown marks a turning point for the “Modern Family” actress. The dress may not have been ideal, but at long last the focus was on the dress rather than her décolletage.

ALBERTO E. RODRIGUEZ/GETTY IMAGES |

Julianne Moore This Chanel Haute Couture gown would be too flowery for the Oscar red carpet, but at the SAGAwards the floral applique detail and plunging neckline were a playful nod to the less stuffy proceedings.

Julianne Moore: This Chanel Haute Couture gown would be too flowery for the Oscar red carpet, but at the SAG Awards the floral applique detail and plunging neckline were a playful nod to the less stuffy proceedings.

ALBERTO E. RODRIGUEZ/GETTY IMAGES |

Actress Julie Bowen of the TV comedy

Julie Bowen: She should know better than to wear leather. But sitting in what may have been a hand-me-down from Joan Jett was punishment enough.

ADREES LATIF/REUTERS |

Jane Lynch Four words that should never appear together in the same sentence: Studded leather harness gown.

Jane Lynch: Four words that should never appear together in the same sentence: Studded leather harness gown.

ALBERTO E. RODRIGUEZ/GETTY IMAGES |

Sigourney Weaver: Did Weaver improvise this gown by stitching a black satin pillow sham to a sheet?

Sigourney Weaver: Did Weaver improvise this gown by stitching a black satin pillow sham to a sheet?

ALBERTO E. RODRIGUEZ/GETTY IMAGES |

Jessica Chastain: In the Twitter universe, there were Jessica Rabbit comparisons galore, but the main reaction this Alexander McQueen gown elicits is a yawn.

Jessica Chastain: In the Twitter universe, there were Jessica Rabbit comparisons galore, but the main reaction this Alexander McQueen gown elicits is a yawn.

JASON KEMPIN/GETTY IMAGES |

Justin Timberlake: Normally dapper in a Tom Ford tux, Timberlake showed up looking like he was ready for a cameo appearance on “The Hour.”

Justin Timberlake: Normally dapper in a Tom Ford tux, Timberlake showed up looking like he was ready for a cameo appearance on “The Hour.”

CHRIS PIZZELLO/INVISION/AP |