UPDATE: Northwestern officially released its full uniforms Friday for Saturday's game against Duke, and the Wildcats will be in all white:

Northwestern will debuting new helmets this Saturday when the Wildcats take on Duke. A photo was leaked on Twitter Thursday night:

This picture comes after Northwestern assistant athletic director for communications Paul Kennedy hinted at new helmets for Saturday on Twitter Thursday:

Sources on the practice field indicate the @NUFBFamily may be discussing thinking about considering the debut of a new helmet on Saturday. — Paul Kennedy (@PK9) September 17, 2015

The Northwestern football Twitter account also tweeted about the new helmets:

We can neither confirm nor deny the discussion about thinking of debuting a new helmet. Maybe. #PracticeFieldSecrets https://t.co/J9jDuILedX — #B1GCats Football (@NUFBFamily) September 17, 2015

Here's another leaked picture of the helmets, which will presumably be officially unveiled Friday:

The helmet features a big wildcat logo similar to the one featured on the black helmets worn by Northwestern against Ohio State in 2013.

h/t George Eisenhauer (@truelaxer3) for the photos on Twitter