The Parks and Recreation star looked lovely in Preen.
The living legend is nominated in the Best First Feature for Fruitvale Station.
The Before Midnight actress is nominated for Best Screenplay with co-writers Ethan Hawke and Richard Linklater.
The Late Night band leader decided to forgo a tie for a more casual look.
The Glee villain kept it casual in a leather jacket, a salmon-colored top and black trousers.
The former Saturday Night Live standout went über-casual.
The Blue Jasmine nominee paired a periwinkle print dress with an oversized bag and nude peep-toe heels.
The Go for Sisters nominee selected a halter-style tangerine look and paired it with metallic sandals.
The actor showed up to support his Spectacular Now co-star Shailene Woodley, who's nominated in the Best Female Lead category. The movie is also up for Best Screenplay.
The actress is up for Best Supporting Female for her role in Fruitvale Station.
The Grown Ups 2 star put a fresh spin on a classic black and white look.
The Masters of Sex star wore a pink shirt and burgundy tie under his two-piece suit.
The American Horror Story: Coven star brightened up in a tangerine cocktail dress.
The Fruitvale Station star wore a Tadashi Shoji dress, Prada shoes, a Jimmy Choo clutch and Irene Neuwirth jewelry.
The In a World... writer/director/producer wore Stella McCartney.
The 47 Ronin star donned a two-piece suit and a patterned tie.
The Frances Ha star wore a citrus-colored shift dress.
The actress, who wore a simple top and skirt, was on hand to present an award.
The How I Met Your Mother newcomer selected a mint-colored dress and paired it with iridescent shoes.
The Nebraska actress paired a printed caftan with a black skirt and sandals.
The How I Met Your Mother actor wore pleated pants and a matching blazer.
The Bad Words actor suited up while his wife wore a strapless, geometric design.
The American Hustle beauty took the plunge in a Maria Lucia Hohan gown and accessorized with Antonini jewels.
The Revolution star modeled a printed gown while her actor husband looked dapper in a navy blue suit.