OP Score!!! You told him and by doing so you nicely put speech things on the table. It’s like, “this is me and if I hiccup a little (or a lot) with my speech it’s okay.” In my judgment that’s a terrific thing to do. It’s so easy to instinctively try to hide stuttering but that actually makes things worse. You are you and you’re just fine stuttering or not. Just be yourself and have a marvelous time on Saturday!