Is it 'guests' or 'guest's' when writing about wedding guests?

Guests is the plural form and it is the word you want for a list of people invited to your wedding. Guest's with an apostrophe shows possession for a single person, so it would only fit if you were talking about one person's invitation or one person's seat.

When you write a heading, an envelope address or a note on a website, guests is the safe choice. You might see guest list, guest book, guest seating or guests' names. Note that guests' with the apostrophe after the s shows that the items belong to more than one person, such as the guests' seating plan or the guests' dietary needs.

If you are unsure, read the sentence aloud. If you could replace the word with people, use guests. If you mean one person owns something, use guest's. If you mean several people own something, use guests'. This small check keeps your wording clear for everyone reading your invitations and online details.