Hilary Duff & Mike Comrie: Casamigos Halloween Party 2013!

Hilary Duff dons a mouse costume while attending the 2013 Casamigos Halloween Party at the home of Mike Meldman on Friday (October 25) in Beverly Hills, Calif.

The 26-year-old actress was joined by her husband Mike Comrie, who dressed up as a doctor.

PHOTOS: Check out the latest pics of Hilary Duff

Michelle Trachtenberg was also seen arriving at the “Dia De Los Muertos – A Frightful Fiesta” themed party, which was hosted by Mike Meldman and Rachel Zalis.

The day before, Hilary was chic while decorating a pumpkin at the 2013 Just Jared Halloween Party in Hollywood.

10+ pictures inside of Hilary Duff and Mike Comrie attending the Casamigos Halloween Party…