If you ever did meet a celebrity in person would you as an average person be nervous not to act stupid?

Somehow I have a friend who has disabilities and somehow bumped into seeing actress Moira Kelly (remember her as voice of Nala from Lion King and several other movies) and I had no idea how that experience went. Personally I would love to meet any voice actor no matter how famous he or she is like from Karen Disher (Scratte) to as high as maybe for example Hayden Pantierre. The only famous people I met are athletes such as Royce Clayton Vinny Castilla and Larry Walker back when they played for the Colorado Rockies during spring training. But I would be nervous meeting actors over athletes cause they seem to have a lot of class and my friend and I have a little disability . Any comments?