When a friend or family member is getting hitched, you can’t help but look forward to celebrating the upcoming union. It’s a big day that often includes people like you, loved ones wishing that special person a lifetime of wedded bliss. As a guest, you contribute to the day’s festivities and how the couple will recollect that day in the future. Your obligations will vary, especially if you’re also a participant. Here are some things you should not do (unless you’re competing for the “Worst Wedding Guest Ever” award).

1. Ignore the RSVP

While weddings can range from simple and lean to over the top and expensive, almost all events will depend on a headcount. The size of the venue, the catering budget, and the seating charts are just some of the many details directly impacted by who’s coming. Responding to an invitation is critical to the day’s plans. Don’t be the person who ignores the RSVP and shows up unannounced. You’ll be at the center of a very awkward situation, and you’ll be adding to the couple’s stress.

2. Dress Inappropriately

While it’s true that beauty (and style) is in the eye of the beholder, it’s important to dress appropriately for the occasion. If the couple requests cocktail or semi-formal attire, don’t be the person who shows up too formal or too casual. If there’s a theme to the event, do your best to look the part. Keep these other tips in mind:

• Never wear white or off-white as a guest, unless specifically asked to do so by the couple.
• Don’t wear flashy outfits that take the attention off the people getting married.
• Avoid skimpy or revealing clothing. (See the previous bullet.)

Many weddings include video and candid photography. The event should be a memorable moment in time, but not because of your clothing (or lack thereof).

3. Bring an Uninvited Guest

Showing up with an uninvited guest is a no-no, especially if you didn’t indicate you’d have a plus-one in your RSVP. This is extremely rude since your guest wasn’t likely accounted for in the headcount and seating arrangements. This includes kids and pets. Many couples are opting for childless events, and while your babies (or fur babies) may be the cutest and most well-behaved in the world, don’t bring them if they’re not invited. If you can’t make arrangements beforehand, it’s better to notify your loved ones about not coming than to show up with your youngsters.

4. Ignore Gift Registries

Gift registries are a convenient way for well-wishers and guests to know what the “nearlyweds” need. There’s no ambiguity about what the couple wants (and how much). If you’re not able to buy a gift, a gift card to the registry store is a nice alternative. Even a cash donation can be welcome, but don’t show up empty-handed if you can help it. Never buy a present without knowing in advance if it’s something wanted or needed.

5. Show Up Too Early or Too Late

There’s a lot going on when it comes to nuptials. Showing up too early or too late is problematic. When you’re too early, you might be in the way when it comes to setting things up. When you’re late, you may be holding up the event, or creating a distraction for an ongoing ceremony. The best practice is to get to the venue at least 30 minutes in advance (earlier, if you’re participating). If you arrive late, don’t draw attention to yourself and be sure not to interfere with the wedding processional.

Wedding etiquette contributes to making your loved ones’ nuptials joyous and memorable. With a little forethought and thoughtfulness (“forethoughtfulness?”), you can avoid actions that negatively impact the occasion. Honor your loved ones and their decision to include you by being a great guest.