Leading the way was 44-year-old Amy Adams, who wore a breathtaking, strapless black gown by Celine, complete with thigh slit detail and peplum silhouette.

The 44-year-old was nominated for her role as Lynne Cheney in Vice.

The category for best Female Actor in a Supporting Role was certainly filled with fashionable celebs.

Amy was up against 35-year-old Emily Blunt, for her role as Evelyn Abbott in A Quiet Place and Margot Robbie, for her performance in Mary Queen of Scots.

30Amy looked beautiful in CelineCredit: AFP or licensors30Margot wore a breathtaking Chanel gownCredit: Rex Features30Margot is up for her role in Mary Queen of ScotsCredit: Getty Images – Getty30Emily looked pretty in pinkCredit: Rex Features30The incredible gown is also backlessCredit: AP:Associated Press30Emma switched it up and wore trousers tonightCredit: Rex Features

Emily blew fans away on the red carpet, in a Michael Kors candy pink sequin gown with a quirky sleeveless statement design.

Meanwhile, Margot stole the show in a white and gold Egyptian-style floor-length gown by Chanel.

Emma Stone, 30 and Rachel Weisz, 48 were both nominated for their roles in The Favourite.

Emma – who has recently switched up her look and dyed her hair dark brown – ditched the gown at tonight’s awards and looked chic and smart in a one-shoulder pussy-bow blouse and wide-leg leather trousers by Louis Vuitton.

30The dress featured a thigh-high slitCredit: Getty Images – Getty30The star teamed it with gold jewelleryCredit: Getty Images – Getty30Bradley Cooper poses with Lady GagaCredit: Rex Features30The star wore burgundy lipstick and nailsCredit: AFP or licensors

Lady Gaga opted for an all-white Christian Dior look, wearing a floor-length gown with cinched-in waist and very high thigh slit.

The 32-year-old teamed the look with bright white heels and plenty of gold jewellery.

And Lady Gaga wasn’t the only one to dazzle on the red carpet tonight.

Gemma Chan blew fans away in a stunning blush pink gown by Oscar de la Renta.

The one shoulder style featured feathered ruffles with a beautiful black waist bow.

30Gemma Chan looked breathtakingCredit: Getty Images – Getty30The stunning design featured a ruffled trainCredit: Getty Images – Getty

Rumer Willis also dazzled on the red carpet, wearing a red terracotta red gown by Ong Oaj Pairam.

The breathtaking style featured a drop waist with draped train and the 30-year-old wore her hair in a chic brown bob with blunt fringe.

Meanwhile, Lucy Boynton, 25, wore a rose floral maxi dress with black polka dot overlay.

The quirky style is by Erdem.

30Rumer wore a gorgeous satin style by Ong Oaj PairamCredit: Rex Features30The 30-year-old wore her hair in a blunt bobCredit: Getty Images – Getty30Lucy looked stylish in a floral gown with sheer black overlayCredit: Rex Features

Betty Gilpin from Glow, wore a dazzling silver tiered gown by Krikor Jabotian.

47-year-old Sandra Oh – who has been nominated for her outstanding performance in Killing Eve – wore a striking, one-shoulder red gown.

The beautiful style featured sequin detail and a stylish side train.

Meanwhile, Ozark’s Sofia Hublitz brought the glam in a gold, plunge neck design by Marchesa.

30Sandra dazzled in redCredit: AP:Associated Press30Betty Gilpin wore Krikor JabotianCredit: Reuters30The breathtaking style dazzled on the red carpetCredit: AP:Associated Press30Sofia Hublitz wore MarchesaCredit: Rex Features30Sophia Bush wore an extravagant black tulle gown by Monique LhuillierCredit: Getty Images – Getty

Also looking incredible on the red carpet tonight was Constance Wu, 36, who wore a delicate strapless design by Oscar de la Renta.

Constance teamed the beautiful style with minimal jewellery and matching strappy heels.

Yara Shahidi also looked magical on the red carpet, arriving in a whimsical pink design by Fendi.

The shimmering jumpsuit featured a delicate tulle overlay and Yara teamed it with nude heels.

30Constance Wu opted for Oscar de la RentaCredit: Rex Features30Yara Shahidi wore a whimsical Fendi designCredit: Getty Images – Getty30Hilaria and Alec Baldwin arrived in styleCredit: Getty – Contributor30Rachel Weisz wore a one-shoulder belted gown by GivenchyCredit: Rex Features30Lupita Nyong’o wore Vera WangCredit: Getty Images – Getty

Also opting for a similar tulle design was Rachel Brosnahan, who wore a silver Christian Dior style with structured corset and layered skirt.

The star teamed the icy look with silver drop earrings.

30Rachel Brosnahan wore Christian DiorCredit: Rex Features30Patricia Clarkson looked radiant in Zuhair MuradCredit: Rex Features30Catherine Zeta Jones wore a glitzy navy plunge gownCredit: AFP or licensors30Melissa McCarthy wore Jenny PackhamCredit: Getty Images – Getty

2019 is the 25th Screen Actors Guild Awards, with the likes of Lady Gaga, Emily Blunt and Hugh Grant up for awards.

It’s an especially special show, with the winners being chosen by fellow actors themselves.

The nominees’ peers come together to vote on the best film and television performances of the year.

This year’s host is Megan Mullally, known for playing Karen Walker in Will & Grace.

The 60-year-old American actress and comedian has seven SAG nominations under her belt for Outstanding Performance by a Female Actor in a Comedy Series thanks to her role in the popular show.