Joe Jonas & Sophie Turner Tie the Knot in Las Vegas! See the Pics

The couple attended the Billboard Music Awards at MGM Grand Garden Arena, and then headed to Chapel L'Amour inside A Little White Wedding Chapel.

TMZ obtained the marriage license, for which they had applied earlier in the day.

Reverend Elvis, the Elvis impersonator who officiated the wedding, told the site that he was booked for the wedding last week, but was not told who was getting married.

Joe and Sophie booked the whole chapel from 8 p.m. to midnight. The DailyMail said the wedding package likely cost about $600.

Diplo was the first to post about the nuptials, revealing in his Instagram Stories details of the ceremony. Watch!

Sophie walked down the aisle in a Bevza jumpsuit, and Joe wore a gray suit and white shirt. The ceremony included a special performance of “Speechless” by country duo Dan + Shay and ended with Reverend Elvis singing “Viva Las Vegas" on what would have been Elvis and Priscilla Presley's 52nd wedding anniversary.

Joe's famous brothers Kevin and Nick served as his groomsmen and wore matching gray suits to celebrate the lovebirds, who announced their engagement in October 2017.

A source told People that Joe and Sophie chose a Vegas wedding to make it legal ahead of a larger ceremony in France. “They had to get married in the States to make it legal, but the wedding is still in Europe,” the insider said.

Earlier in the night, “Extra” caught up with Joe on the Billboard Awards red carpet, where he praised Sophie for opening up about her mental health on a recent episode of Dr. Phil's “Phil in the Blanks” podcast. The “Game of Thrones” star revealed she has battled depression.

“It's a lot,” Joe said. “I think the best thing about it is she can encourage other young people out there who are going through similar stuff and be a voice that they can listen to… I am proud of her.”

He went on to perform a medley of Jonas Brothers hits with his brothers, including their #1 single “Sucker."

A few weeks ago, Nick played coy about Joe's wedding. He told "Extra's" Tanika Ray that the wedding will be “different” from his getting married in India and having two ceremonies, but promised, “They are going to have a beautiful wedding.”