Wearing sequins to a wedding is not necessarily considered tacky, but it's crucial to consider the time, location, and formality of the event before deciding on such a bold fashion choice. Sequins can be appropriate for evening weddings or more glamorous settings, where a sparkly outfit can complement the overall festive atmosphere. However, for morning or afternoon weddings, or ones held in more casual or outdoor settings, a sequined outfit might seem overly flashy or attention-grabbing. It's always best to consider the wedding's dress code, if one is provided, and when in doubt, reach out to the hosts or other attendees to gauge the appropriateness of your outfit. Remember, the key is to look festive and respectful, but not to outshine the bride on her special day.