The Girls star shows off her masculine side in preparation for her starring role in NBC's next live musical presentation.
The Tony winner may not be donning his "black stache," but he very well may return to his Peter Pan roots.
Williams will put her vocal chops to the test in the live telecast this December.
This will be the team's third consecutive year working with the show.
NBC is officially considering bringing one of several Broadway titles to the small screen next year.