Sophie Turner and Joe Jonas tied the knot in a surprise wedding ceremony in Las Vegas on Wednesday night.

The couple were in Vegas for the Billboard Music Awards and after it concluded the couple, who announced their engagement in October 2018, went to a wedding chapel and exchanged vows in front of an Elvis impersonator.

Diplo shared videos of the ceremony to his Instagram stories, and E! News have confirmed that the Game of Thrones star and Jonas Brothers singer obtained a marriage licence on May 1.

In Diplo's Instagram stories 23-year-old Turner can be seen walking down the aisle wearing a white dress, veil and bouquet. In another Jonas is seen waiting at the top of the room as country music duo Dan + Shay perform their song Speechless ahead of Turner's arrival.

The couple had previously revealed plans for a summer wedding, but when in Vegas...

During the Billboard Music Awards, the Jonas Brothers performed their hit comeback single Sucker as part of a medley including Nick's solo song Jealous and Joe's band DNCE's Cake By The Ocean.

Turner, Nick's wife Priyanka Chopra and Kevin's wife Danielle all sitting in the front row to cheer them on.