Derek Hough & Rachel Zalis Get Into Halloween Spirit at Casamigos Party

Derek Hough sports a black costume while hitting a Halloween party at Mike Meldman‘s residence on Friday (October 24) in Beverly Hills, Calif.

The 29-year-old Dancing with the Stars dancer was accompanied by fashion guru Rachel Zalis, who co-hosted the Casamigos Tequila party.

PHOTOS: Check out the latest pics of Derek Hough

Paris Hilton was also seen channeling Minnie Mouse at the party.

“Thank you @EtienneOrtega for transforming me into my favorite Disney character Minnie Mouse. ❤️🐭❤️,” Paris wrote on Twitter.

FYI: Casamigos Tequila is a company owned by Mike, Rande Gerber, and their close pal George Clooney.

10+ pictures inside of Derek Hough and Rachel Zalis at a Halloween party…