Hollywood A-listers gathered at the 25th annual Producers Guild of America Awards in Beverly Hills on Sunday night -- and there was some red hot fashion!

Fresh from her win at the SAG Awards on Saturday night, Lupita Nyong'o donned a more streamlined and modern silhouette, with a salmon-colored, one-shoulder Stella McCartney dress. She accentuated her beautiful skin with gold eye makeup and a dark plum lip.

Another stunning star on the red carpet? Kristin Chenoweth.

The actress flaunted her decolletage in a floor-length black and blue gown with a plunging neckline, rocking her new short 'do. She added a pop of bling with dangling diamond earrings.

But both women may have been outshined by Helen Mirren!

The 68-year-old, who has been a star this awards show season, wore a sparkly nude gown by Elie Saab that had serious sex appeal.

Who gets your vote for Best Dressed? Sound off below, and click "Launch Gallery" above to see photos of all the stars, including Brad Pitt, Leonardo DiCaprio and Claire Danes!