Rockin' the red carpet: Halsey and Evan Peters step out with music-inspired costumes

New couple alert: Halsey and Evan Peters are officially an item.

The two hit the red carpet together, in matching costumes, for "American Horror Story"'s 100th episode celebration on Saturday.

The couple dressed as Sonny and Cher for the event, with matching white and rainbow polka dot outfits that the iconic duo made famous on the Sonny and Cher Comedy Hour, Billboard reported.

The "Without Me" singer completed her Cher look with heavy eye makeup and a long dramatic black wig while Peters, 32, adorned a fluffy wig of his own along with a fake mustache and sideburns -- and go-go boots.

The pair began stoking romance rumors earlier this month. On Friday, Peters was a guest at Halsey's "Almost Famous" Halloween party and, again, both had similar costumes.

Peters dressed as a Juggalo from Insane Clown Posse while Halsey got her goth on as Marylin Manson.

Halsey later uploaded photos of their striking outfits to her Instagram.