Ariel Winter wore her sexiest look ever to the 2017 Emmys

Leave it to Ariel Winter to steal the show at the 2017 Emmys.

The 19-year-old "Modern Family" actress stepped out for the 69th annual Primetime Emmy Awards on Sunday night in a revealing gown with not one -- but two! -- thigh-high slits.

SEE ALSO: Jane Fonda was unrecognizable at the 2017 Emmys

Winter is known for sexy ensembles on red carpets, but this one might take the cake. The sheer, strapless gown featured glittering detailing and a high, black collar. She finished off the look with black pumps, dark eye makeup and slicked-back hair.

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Ariel Winter at the 2017 Emmys
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Ariel Winter at the 2017 Emmys
LOS ANGELES, CA - SEPTEMBER 17: Actor Ariel Winter attends the 69th Annual Primetime Emmy Awards at Microsoft Theater on September 17, 2017 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - SEPTEMBER 17: Actor Ariel Winter attends the 69th Annual Primetime Emmy Awards at Microsoft Theater on September 17, 2017 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)
LOS ANGELES, CA - SEPTEMBER 17: Actor Ariel Winter attends the 69th Annual Primetime Emmy Awards at Microsoft Theater on September 17, 2017 in Los Angeles, California. (Photo by J. Merritt/Getty Images)
LOS ANGELES, CA - SEPTEMBER 17: Actor Ariel Winter attends the 69th Annual Primetime Emmy Awards at Microsoft Theater on September 17, 2017 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
LOS ANGELES, CA - SEPTEMBER 17: Actors Ariel Winter (L) and Levi Meaden attend the 69th Annual Primetime Emmy Awards at Microsoft Theater on September 17, 2017 in Los Angeles, California. (Photo by John Shearer/WireImage)
LOS ANGELES, CA - SEPTEMBER 17: Actor Ariel Winter (L) and Levi Meaden attend the 69th Annual Primetime Emmy Awards at Microsoft Theater on September 17, 2017 in Los Angeles, California. (Photo by J. Merritt/Getty Images)
LOS ANGELES, CA - SEPTEMBER 17: Actors Ariel Winter (L) and Levi Meaden attend the 69th Annual Primetime Emmy Awards at Microsoft Theater on September 17, 2017 in Los Angeles, California. (Photo by John Shearer/WireImage)
LOS ANGELES, CA - SEPTEMBER 17: Actors Levi Meaden (L) and Ariel Winter attend the 69th Annual Primetime Emmy Awards at Microsoft Theater on September 17, 2017 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
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The outspoken star brought her boyfriend, Levi Meaden, as her date on Sunday night, just a few days after she helped him celebrate his 30th birthday. The couple was all over each other as they posed for photographers on the red carpet, and they looked very cute -- and happy! -- together. 

They've been dating for just under a year now, but they already live together in Los Angeles. For more on their birthday celebrations from this weekend, watch the video above.

See more stars at the 2017 Emmys:

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Emmy Awards 2017: Red carpet arrivals
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Emmy Awards 2017: Red carpet arrivals

Michelle Pfeiffer looks positively stunning in this tea-length black lace dress.

(Photo by John Shearer/WireImage)

Heidi Klum looked gorgeous as ever in a va-va-voom red gown.

(Photo by Steve Granitz/WireImage)

Former "Dancing With the Stars" judge Julianne Hough was stunning in a black tulle Marchesa gown with pink floral embellishments.

(Photo by Frazer Harrison/Getty Images)

Sofia Vergara dazzled in a white gown with a sweetheart neckline.

(Photo by Jeff Kravitz/FilmMagic)

"Veep" actress Anna Chlumsky sparkled in a silver, sequinned fishtail dress with a plunging neckline.

(Photo by Jeff Kravitz/FilmMagic)

"This Is Us" standout Sterling K. Brown was dapper in a black tux.

(Photo by David Crotty/Patrick McMullan via Getty Images)

Yara Shahidi looked lovely in this dreamy tulle gown featuring feminine frilled shoulders.

(Photo by J. Merritt/Getty Images)

Laura Dern kept it chic in black and white.

(Photo by Jeff Kravitz/FilmMagic)

Zoe Kravitz was a feathered goddess in this show-stopping rainbow gown.

(Photo by Steve Granitz/WireImage)

Viola Davis dazzled in a silk peach gown.

(Photo by Kevin Mazur/WireImage)

Jane Fonda looked white-hot in this hot pink gown.

(Photo by John Shearer/WireImage)

Jessica Biel stunned in a shimmering, flowing gown.

(Photo by John Shearer/WireImage)

Debra Messing rocked an iridescent mauve gown with an asymmetrical neckline.

(Photo by Frazer Harrison/Getty Images)

Nicole Kidman was absolute perfection in this vibrant, crimson tea-length gown.

(Photo by Kevin Mazur/WireImage)

Samira Wiley rocked a figure-hugging white gown with a high neckline and geometric cutouts.

(Photo by Frazer Harrison/Getty Images)

Hilaria Baldwin is gorgeous in floral alongside her dapper husband, nominee Alec Baldwin.

(Photo by Steve Granitz/WireImage)

Rashida Jones shined in a pretty lavender dress.

(Photo by Frazer Harrison/Getty Images)

Leslie Jones sparkled in this sassy sheer black gown.

(Photo by John Shearer/WireImage)

Reese Witherspoon showed off her toned legs in a short teal coat dress.

(Photo by John Shearer/WireImage)

GORGEOUS. Shailene Woodley looked positively ethereal in this plunging velvet gown.

(Photo by J. Merritt/Getty Images)

Judith Light chose a dramatic black gown with voluminous shoulders.

(Photo by Frazer Harrison/Getty Images)

Elisabeth Moss wore a petal pink strapless cocktail dress.

(Photo by Frazer Harrison/Getty Images)

Evan Rachel Wood was stunning in a unique white pantsuit with a cropped tuxedo jacket and flowing pants. Her beauty look was done by Toby Fleischman, who used Burt's Bees products. (Photo by Gregg DeGuire/Getty Images)

Gabrielle Union went with a sheer black lace dress, topping it off with a matching bolero.

(Photo by Kevin Mazur/WireImage)

Felicity Huffman stunned in a powder blue lace mermaid gown.

(Photo by J. Merritt/Getty Images)

Laverne Cox sparkled in a low-cut metallic gown.

(Photo by J. Merritt/Getty Images)

Vanessa Kirby looked gorgeous in Marchesa.

(Photo by Kevin Mazur/WireImage)

Millie Bobby Brown looked gorgeous in a tea-length white ball gown.

(Photo by Steve Granitz/WireImage)

Mandy Moore's tiered black and white tulle gown was a show-stopper on the red carpet.

(Photo by J. Merritt/Getty Images)

"Stranger Things" stars Finn Wolfhard, Noah Schnapp, Gaten Matarazzo and Caleb McLaughlin brought the swag in varied looks.

(Photo by Frazer Harrison/Getty Images)

Sarah Hyland showed off her toned abs in a midriff-baring, fall-inspired dress.

(Photo by Steve Granitz/WireImage)

"Insecure" star and creator Issa Rae was a vision in an asymmetrical red dress.

(Photo by Frazer Harrison/Getty Images)

The back of "Insecure" star Issa Rae's look.

(Photo by Frazer Harrison/Getty Images)

Robin Wright and Dylan Penn are a gorgeous mother-daughter duo on the red carpet.

(Photo by Frazer Harrison/Getty Images)

Mackenzie Davis stunned in a vibrant Delpozo dress.

(Photo credit should read MARK RALSTON/AFP/Getty Images)

Steven Glover and Donald Glover brought double the dapper to the red carpet.

(Photo by MARK RALSTON/AFP/Getty Images)

Aziz Ansari chose a classic black tux for the occasion.

(Photo by Steve Granitz/WireImage)

Chrissy Metz looked lovely in a perfect-for-fall teal dress.

(Photo by MARK RALSTON/AFP/Getty Images)

Jessica Lange wore an embellished black velvet gown.

(Photo by Frazer Harrison/Getty Images)

Susan Sarandon is as ageless as ever in navy blue.

(Photo by Frazer Harrison/Getty Images)

Sarah Paulson channeled the 'DWTS' mirrorball trophy with this sparkling, edgy gown.

(Photo by Frazer Harrison/Getty Images)

Samantha Bee wore a futuristic green gown.

(Photo by Steve Granitz/WireImage)

Priyanka Chopra took a risk in this geometric, feathered gown.

 (Photo by Frazer Harrison/Getty Images)

Producer Naomi Scott and Adam Scott make black and blue look good.

(Photo by Frazer Harrison/Getty Images)

Thandie Newton was the picture of perfection in this sparkly gown.

(Photo by Frazer Harrison/Getty Images)

Keri Russell and Matthew Rhys were a super serious (but stylish) pair on the red carpet.

(Photo by Kevin Mazur/WireImage)

Tina Fey makes houndstooth look good in this shimmering gown.

 (Photo by John Shearer/WireImage)

Julia Louis-Dreyfus went for a classic black strapless dress with yellow accents.

(Photo by Frazer Harrison/Getty Images)

"Modern Family" star Rico Rodriguez was all grown-up in a blue suit.

(Photo by David Crotty/Patrick McMullan via Getty Images)

"Billy on the Street" star Billy Eichner was a total hunk in a blue suit.

(Photo by Frazer Harrison/Getty Images)

Tracee Ellis Ross wore a sparkling, feathered, voluminous gown.

(Photo by Steve Granitz/WireImage)

Pete Davidson, Kyle Mooney, Aidy Bryant, Mikey Day and Beck Bennett of 'SNL' sure do clean up nice (and Aidy looks lovely).

(Photo by Frazer Harrison/Getty Images)

Rachel Bloom chose a classic black dress with a little bit of lace.

(Photo by J. Merritt/Getty Images)

"Access Hollywood" co-hosts Kit Hoover and Natalie Morales were a picture-perfect duo.

(Photo by Frazer Harrison/Getty Images)

Kristin Cavallari kept it simple in this pink strapless gown.

(Photo by Frazer Harrison/Getty Images)

Padma Lakshmi's sassy haircut stole the show -- but her mermaid gown was a head-turner too.

(Photo by Steve Granitz/WireImage)

Jeremy Maguire and Aubrey Anderson-Emmons of 'Modern Family' are growing up so fast!  

(Photo by Frazer Harrison/Getty Images)

Edie Falco continues the asymmetrical neckline trend with this red gown.

(Photo by Kevin Mazur/WireImage)

Uzo Aduba shined in shimmering stripes.

(Photo by Frazer Harrison/Getty Images)

James Corden and Julia Carey are a beautiful pair.

(Photo by J. Merritt/Getty Images)

Nancy O'Dell wears a one-sleeve black gown.

(Photo by David Crotty/Patrick McMullan via Getty Images)

Miles Brown is oh-so-adorable and dapper in black and white.

(Photo by Frazer Harrison/Getty Images)

Cara Buono wears a strapless gown with a blue ruffle.

(Photo by Jeff Kravitz/FilmMagic)

Angela Sarafyan was a vision in yellow.

(Photo by J. Merritt/Getty Images)

Barbara Alyn Woods goes bold with a vibrant column gown.

(Photo by David Crotty/Patrick McMullan via Getty Images)

Renee Bargh chose a metallic dress for the evening.

(Photo by David Livingston/Getty Images)

Raini Rodriguez's strapless dress had fabulously embellished pockets.

(Photo by David Crotty/Patrick McMullan via Getty Images)

Modern Family's Nolan Gould rocks the navy suit trend, and we love it.

(Photo by John Shearer/WireImage)

Ryan Michelle Bathe's dress would fit right in on the 'Westworld' set.

(Photo by David Crotty/Patrick McMullan via Getty Images)

Brian Tyree Henry tops it all off with a bowler hat.

(Photo by Frazer Harrison/Getty Images)

Jackie Hoffman wore a black sparkling v-neck gown.

(Photo by Frazer Harrison/Getty Images)

Louise Roe makes a style statement in a tiered, frilled, lace black dress.

(Photo by Frazer Harrison/Getty Images)

The patterns Rickey Minor and Rachel Montez Minor are wearing are clashing quite a bit, but we'd like them separately.

(Photo by David Crotty/Patrick McMullan via Getty Images)

Claire Foy takes a style risk in this sleek jumpsuit.

(Photo by Kevin Mazur/WireImage)

Anika Noni Rose rocks a pale peachy-hued ball gown.

(Photo by Jeff Kravitz/FilmMagic)

Gail Simmons chose a pleated metallic gown.

(Photo by J. Merritt/Getty Images)

Gina Rodriguez looked totally gorgeous in her red plunging gown.

(Photo by Kevin Mazur/WireImage)

Brandon Flynn took the blue suit to a new level with this powder blue hue.

(Photo by J. Merritt/Getty Images)

Abby Elliott wore a simple, but gorgeous, sparkling gown.

(Photo by Frazer Harrison/Getty Images)

Ajiona Alexus attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Amanda Crew wore head-to-toe sequins.

(Photo by J. Merritt/Getty Images)

Ron Cephas Jones looked dapper as ever in his black and white suit.

(Photo by John Shearer/WireImage)

Kiernan Shipka continues her red carpet home run with a subtle, elegant gown.

(Photo by Steve Granitz/WireImage)

Regina King attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Ashley Nicole Black attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Anthony Anderson and Alvina Stewart attend the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Nina Kiri attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Chris Sullivan and Rachel Reichard attend the 69th Annual Primetime Emmy Awards.

(Photo by Kevin Mazur/WireImage)

Emmy Rossum attends the 69th Annual Primetime Emmy Awards wearing Burt's Bees skin products and KMS hair products.

(Photo by John Shearer/WireImage)

Yvette Nicole Brown attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Marsai Martin attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Justin Mikita and Jesse Tyler Ferguson attend the 69th Annual Primetime Emmy Awards.

(Photo by John Shearer/WireImage)

Erin Lim and Lamorne Morris attend the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Tessa Thompson attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Brad Goresk attends the 69th Annual Primetime Emmy Awards.

(Photo by Kevin Mazur/WireImage)

Kumail Nanjiani and Emily V. Gordon arrive for the 69th Emmy Awards.

(Photo credit should read MARK RALSTON/AFP/Getty Images)

Ruby Modine attends the 69th Annual Primetime Emmy Awards.

(Photo by Kevin Mazur/WireImage)

Jenifer Lewis attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Shannon Purser attends the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Yvonne Strahovski attends the 69th Annual Primetime Emmy Awards.

(Photo by John Shearer/WireImage)

Carrie Coon arrives for the 69th Emmy Awards.

(Photo credit should read MARK RALSTON/AFP/Getty Images)

Jimmi Simpson attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Amanda Brugel attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Deon Cole attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Madeline Brewer looked lovely in a silver BERTA gown.

(Photo by J. Merritt/Getty Images)

Mark Feuerstein attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Giancarlo Esposito and Joy McManigal attend the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

John Lithgow and Mary Yeager attend the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Kate McKinnon attends the 69th Annual Primetime Emmy Awards.

(Photo by Kevin Mazur/WireImage)

Ariel Winter attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Kathryn Hahn attends the 69th Annual Primetime Emmy Awards.

(Photo by Jeff Kravitz/FilmMagic)

Julie Bowen attends the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Reed Morano attends the 69th Annual Primetime Emmy Awards.

(Photo by Kevin Mazur/WireImage)

Lea Michele attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Halston Sage attends the 69th Annual Primetime Emmy Awards.

(Photo by J. Merritt/Getty Images)

Neve Campbell attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

 Jeffrey Tambor and Kasia Tambor attend the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Vanessa Bayer attends the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Stanley Tucci attends the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Michael Kelly and Karyn Kelly attend the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Chrishell Stause attends the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Ellie Kemper attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Tituss Burgess attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Susan Kelechi Watson attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Alison Wright attends the 69th Annual Primetime Emmy Awards.

(Photo by Jeff Kravitz/FilmMagic)

Annie Parisse attend the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Lily Tomlin attends the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Sonequa Martin-Green arrives for the 69th Emmy Awards.

(Photo credit should read MARK RALSTON/AFP/Getty Images)

Joe Keery, Natalia Dyer and Charlie Heaton attend the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Matt Smith attends the 69th Annual Primetime Emmy Awards.

(Photo by John Shearer/WireImage)

Lakeith Stanfield attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Jennifer Nettles attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Allison Janney attends the 69th Annual Primetime Emmy Awards.

(Photo by Steve Granitz/WireImage)

Jeremy Piven attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

Gillian Anderson attends the 69th Annual Primetime Emmy Awards.

(Photo by Frazer Harrison/Getty Images)

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