Taylor Swift and Calvin Harris finally went public with their romance at last night’s 'Billboard Music Awards' (May 17).

After months of speculation, the couple sat together at the ceremony - held at the MGM Grand in Las Vegas - with the Scottish DJ embracing Tay as she won most of the gongs at the bash.

The ‘Bad Blood’ singer wore a glittery, white cleavage-flashing catsuit for the occasion, while Harris looked dapper in a navy suit and black shirt.

At one point, T-Swizzle even leant forward to kiss her beau as she beat pals Sam Smith and Ed Sheeran to the Top 200 Album accolade for '1989'.

When accepting the accolade, the 25-year old noted: “'I am so happy to win this for 1989. We put it out and you guys embraced change… for me doing something new.

“I love you more than I will ever be able to say to you. I love you so much.”

And it seems love was well and truly on the cards for Tay and Calvin, as the pair continued to flaunt their romance throughout the star-studded event, where the likes of their famous exes Harry Styles and Rita Ora were in attendance.

Taylor went on to win a total of eight gongs at the bash, with Harris also picking up the award for Top Dance/Electronic artist.

Billboard Music Awards 2015: Winners

TOP ARTIST

Taylor Swift

TOP NEW ARTIST

Sam Smith

TOP MALE ARTIST

Sam Smith

TOP FEMALE ARTIST

Taylor Swift

TOP DUO/GROUP

One Direction

TOP BILLBOARD 200 ARTIST

Taylor Swift

TOP HOT 100 ARTIST

Meghan Trainor

TOP DIGITAL SONGS ARTIST

Taylor Swift

TOP RADIO SONGS ARTIST

John Legend

TOP TOURING ARTIST

One Direction

TOP SOCIAL ARTIST

Justin Bieber

TOP STREAMING ARTIST

Iggy Azalea

TOP R&B ARTIST

Pharrell Williams

TOP RAP ARTIST

Iggy Azalea

TOP COUNTRY ARTIST

Florida Georgia Line

TOP ROCK ARTIST

Hozier

TOP LATIN ARTIST

Romeo Santos

TOP DANCE/ELECTRONIC ARTIST

Calvin Harris

TOP CHRISTIAN ARTIST

Hillsong United

TOP BILLBOARD 200 ALBUM

Taylor Swift, 1989

TOP SOUNDTRACK

Frozen

TOP R&B ALBUM

Pharrell Williams, G I R L

TOP RAP ALBUM

J. Cole, 2014 Forest Hills Drive

TOP COUNTRY ALBUM

Jason Aldean, Old Boots, New Dirt

TOP ROCK ALBUM

Coldplay, Ghost Stories

TOP LATIN ALBUM

Enrique Iglesias, Sex and Love

TOP DANCE/ELECTRONIC ALBUM

Lindsey Stirling, Shatter Me

TOP CHRISTIAN ALBUM

Lecrae, Anomaly

TOP HOT 100 SONG

Meghan Trainor, All About That Bass

TOP DIGITAL SONG

Meghan Trainor, All About That Bass

TOP RADIO SONG

Sam Smith, Stay With Me

TOP STREAMING SONG (AUDIO)

John Legend, All of Me

TOP STREAMING SONG (VIDEO)

Taylor Swift, Shake It Off

TOP R&B SONG

Pharrell Williams, Happy

TOP RAP SONG

Iggy Azalea feat. Charli XCX, Fancy

TOP COUNTRY SONG

Jason Aldean, Burnin’ It Down

TOP ROCK SONG

Hozier, Take Me to Church

TOP LATIN SONG

Enrique Iglesias feat. Descemer Bueno & Gente de Zona, Bailando

TOP DANCE/ELECTRONIC SONG

DJ Snake & Lil Jon, Turn Down For What

TOP CHRISTIAN SONG

Carrie Underwood, Something in the Water

BILLBOARD CHART ACHIEVEMENT AWARD PRESENTED BY SAMSUNG GALAXY (FAN-VOTED)

Taylor Swift