It was announced last week that Allison Williams will be playing Peter Pan in the upcoming live-action NBC musical, and on Tuesday, the Girls star shared a video of her very first flight practice via Instagram. She captioned the clip with a heartfelt message to late actor Robin Williams, who passed away this week: "First day of flying lessons for Pan. Thinking about and missing a hero of mine who once did this and left big shoes to fill." Robin famously portrayed Peter Pan in the 1991 movie Hook, and it became one of his most memorable roles. Watch Allison's first official flying lesson above now.