Before you pop a confirmed speaker's name into your marketing materials, make sure to nail down the specifics of the event, set expectations, and begin an open dialogue with your speaker.
Sometimes this is via a professional contract, and other times it’s via simply via email. Either way, both parties should be clear on how and when they will be involved in the planning and promotion process of the event. Besides sharing the date, time, and duration of the gig, this is where you can ask the speaker for their help with event promotion, ensure you’re allowed to use their name in your Tweets, and offer audience demographics to help them better tailor their presentation.
Also share a detailed description of how you will include them in the event and what they’ll need to produce, whether that’s a presentation with slides, an outline, or simply a discussion topic.