Derek Hough & Hayley Erbert Nail Their Couple's Costume For Halloween

Derek Hough and Hayley Erbert show off their mysterious and classy Halloween costumes while attending the 2016 Casamigos Halloween Party on Friday night (October 28) in Beverly Hills, Calif.

The Dancing With the Stars pro dancers stepped out for the annual bash alongside Ryan Lochte, his fiance Kayla Rae Reid and lifestyle guru Lauren Conrad.

In his latest blog, Derek opened up about Halloween week on DWTS: “I don’t know what my Halloween costume is going to be in real life, but we’re doing a spider theme for the dance.”

He added, “She’s [Marilu Henner] a black widow and I get trapped in her web. It’s kind of cool the way it starts. We’re going to kind of make the web. I went to a fabric store on Tuesday and bought some white elastics and we’re going to do this choreography with them.”

20+ pics inside of Derek Hough and Hayley Erbert…