10 mistakes guests should never make at weddings, according to etiquette experts

• Guests shouldn’t ignore the RSVP deadline or arrive late to the ceremony.
• Overindulging at the bar, bringing an uninvited guest, and taking food home are all major faux pas.

“A couple’s registry is a curated list reflecting their needs and tastes,” Grotts told BI. “Disregarding it can result in redundant or unwanted items, hence returns.”

Making the day about you

Hayes told BI that claiming the spotlight with any big personal announcement or news is both self-centered and inconsiderate.

“Don’t steal the spotlight or make the day about yourself in any way. This includes no wedding proposals or baby news announcements. The day is about the couple, not you,” Hayes said.

Assuming you can take food home with you

Leighton said it’s never tasteful for guests to bring to-go containers with them, no matter how casual the wedding is.

“The hosts want you to have a nice time, but they probably don’t want to cater all your meals for the week,” he said.

It’s best to avoid banking on the idea of leftovers altogether — and always ask permission before taking anything home.

This story was originally published on June 4, 2025, and most recently updated on May 18, 2026.