From Salma Hayek to Armie Hammer, here's a look at some of the more stand-out styles of the evening:
1. Salma Hayek
The 51-year-old actress looked stunning in a flowing green Gucci dress that included a pink ribbon which cinched her waist.
2. Armie Hammer
The 31-year-old Call Me By Your Name star didn't wear the typical black-and-white tuxedo. Instead, he opted for a gold Dolce & Gabbana tux jacket and Christian Louboutin shoes.
Hammer admitted that this ensemble wasn't necessarily his first choice. "I almost wore the same jacket that Sam Rockwell is wearing, so I'm glad I went with something a little different," he quipped.
Let it be known that Rockwell was sporting a pretty cool jacket.
3. Saoirse Ronan
The 23-year-old Lady Bird star opted for a pink-and-orange Gucci dress and shoes that she paired with Fernando Jorge jewelry, and admitted to ET that she has some help getting dressed for such occasions.
"I have a really, really brilliant stylist, Elizabeth Saltzman, who makes them for me," she shared. "It's actually been a really good way to sort of get to know designers and work with different people and things."
4. Laurie Metcalf
Ronan's 62-year-old Lady Bird co-star chose a colorful style for the awards ceremony, stepping out in a Christian Siriano dress, L.K. Bennett shoes and Dean Davidson jewelry.
5. Mary J. Blige
The 46-year-old Mudbound actress wore a baby blue Elie Saab gown and Chopard jewelry, and revealed to ET how she's preparing for the Golden Globes on Sunday.
"I'm dieting," Blige -- who is nominated for a Golden Globe -- confessed. "I'm just kind of relaxing and enjoying the moment of just being nominated. That's the beautiful thing in itself -- and doing fittings and celebrating. Celebrating the nom."
6. Jessica Chastain
The 40-year-old Molly's Game star wore a black Givenchy dress with stunning lace sleeves, and paired it with Piaget jewelry.
7. Gal Gadot
The 32-year-old Wonder Woman actress wore a sexy yellow Esteban Cortazar dress and Jason of Beverly Hills studs.
8. Octavia Spencer
Stepping out in a simple-yet-elegant Tadashi Shoji gown, the 47-year-old Shape of Water star was all smiles as she waved to cameras on the red carpet.
9. Holly Hunter
The 59-year-old Big Sick star hit the red carpet in a curve-hugging, floor-length white dress.
10. Allison Janney
The I, Tonya star admitted to ET that she wasn't sure she'd "make it across the road" in her heels, but she did -- and made it look effortless. Janney was absolutely gorgeous in an emerald, off-the-shoulder gown that she paired with simple accessories.