Help the frantic wedding planner finalize the schedule by choosing the grammatically correct option for her panicked text message!

I can't deal with the caterers tomorrow because I ___ the bride at 10:00 AM to review the flowers, and the actual ceremony ___ promptly at noon!

The correct answer is am meeting / begins.

We use the Present Continuous (am meeting) for fixed personal arrangements in the future. We use the Present Simple (begins) for official schedules, timetables, and unchangeable itineraries.

The option will meet / begin is incorrect because "the ceremony begin" lacks the third-person singular "s".