2018 SAG Awards Fashion: The Biggest Red Carpet Hits and Misses

Babe in blue! The This Is Us star wore a custom cobalt embroidered sequin slip dress from the Ralph Lauren Collection, pairing the stunning gown with a matching box clutch, bombshell curls and a gorgeous smokey eye.

The actress channeled her GLOW character, Ruth Wilder, on the red carpet, stepping out in a bright red, off-the-shoulder Dundas dress lined in the shape of a thunderbolt with sequin detailing. She completed the edgy look with blue drop earrings and sky-high purple platform stilettos.

Seemingly taking a cue from her co-star Mandy Moore, the This Is Us star also rocked an electric blue gown and luscious, voluminous curls. The actress accessorized her Rubin Singer dress with a berry pout, black clutch, long, dainty earrings and sparkly silver heels.

When you're making history as the first-ever SAG Awards host, you have to make a statement, and that's exactly what Bell did! The Good Place star looked like a real-life princess in a bright pink J. Mendel gown embroidered with red floral embellishments throughout. She topped off the look with jewels from Lorraine Schwartz and Platinum Jewelry, a pink box clutch and soft makeup.

Gorgeous in green! The Big Little Lies star turned heads on Sunday, rocking a stunning off-the-shoulder Zac Posen gown styled with emerald jewels that perfectly complemented her skin tone and made her eyes pop. Her brushed out waves and light pink lipstick added an extra glam touch.

The Grown-ish star wowed on Sunday, rocking her au naturale locks and a glossy, deep red lip color from Chanel. She was one of many fabulous ladies who opted for a jumpsuit -- a custom strapless silk cady tuxedo number from Ralph Lauren.

The This Is Us ladies weren't the only ones from the cast making a statement on the red carpet! Their co-star looked as dapper as ever in an all-black Yves Saint Laurent ensemble with a David Yurman watch.

Pretty in pink! The Lady Bird star donned a chic, long-sleeved Louis Vuitton number with silver detailing, keeping her blond locks pulled back in a messy updo with black-and-silver chandelier earrings. She went simple with her makeup, opting for a soft, natural look that kept all focus on her stunning dress.

The Get Out star was the epitome of handsome, rocking a peak lapel jacket with velvet detail, tuxedo trousers, a v-neck shirt and black velvet slip-ons, all by Ermenegildo Zegna Couture.

When in doubt, rock sparkles! The Big Little Lies star wore a sequined Armani Prive number, pairing it with yellow diamond drop earrings and a diamond ring from Harry Winston.

The Captain Marvel star proved once again that when it comes to red carpet style, she's a real-life fashion superhero. The actress wore a sparkly Gucci dress and went dramatic with her beauty look by mixing bright blue eyeshadow with a peach pout. Her Neil Lane jewelry added the perfect finishing touch.

The Black-ish star wowed in an all-white Ralph & Russo ensemble consisting of a silk draped gown with glass bead embroidery and an asymmetric cape. Her bright red lip color gave the look the perfect punch!

Chic in a patterned Randi Rahm dress, Yliana Yepez clutch and jewels by Butani, Djula and Hearts on Fire, the Wet Hot American Summer: Ten Years Later actress completely nailed it.

Stunning as always! The actress showed off her fit figure in a beautiful, floor-length rose gold gown custom made by Pamella Roland. The frock featured hand-embroidered sequins and crystals, as well as hand-dyed silk tulle overlay that wrapped around the back.

While we're usually a fan of the GLOW star's red carpet looks, we weren't totally feeling this ruffled, powder blue dress, which featured puffy layers and a high neckline.

The combination of the bell sleeves, black bows and sheer paneling on the actress' Philosophy di Lorenzo Serafini frock wasn't a look we'd typically pick for a red carpet.

While we love when celebrities go big or go home at awards shows, this Sachin & Babi number the GLOW star wore was a bit too over the top.

The Black Mirror star took a risk by rocking a sheer, off-the-shoulder gown, but the beige number was a bit underwhelming.

The hue of this dress? Fabulous! The ruffles? Not so much. 

The Orange Is the New Black star usually nails it on the red carpet, but this oversized, pastel purple feather gown by Rami Kadi, paired with a sparkly headpiece, was a fashion misstep.

Like Amanda Warren, the GLOW star also went with a sheer ensemble, but missed the mark.

Bright colors are a perfect way to make a statement on a red carpet, but this loud Dior ensemble left us feeling a little dizzy.