If appropriate, get students excited by setting up interactions beforehand, such as making a BINGO card where students mark a square if the presenter says something, or create a Kahoot challenge for after the presentation.
Make sure to take photos and complete an activity form for All-Star points.
Make it GREAT
See if this could be a school-wide assembly or invite other class groups to come listen to the presenter. Make time for questions or for students to meet the presenter.