The 35-year-old actress, who is a presenter, was joined on the red carpet by her husband Josh Kelley.
“Time to get all dolled up for the #Emmys Good luck to the nominees! Looking forward to presenting one of these later,” Katherine tweeted earlier in the day.
Make sure to tune in for the 2014 Emmy Awards, hosted by Seth Meyers, airing NOW on NBC!
FYI: Katherine is wearing a vintage Parisian silk John Hayles dress, Chopard jewels, Christian Louboutin shoes, and Oroton clutch.