The language and images on your event page, emails, and RSVP forms should always be inclusive. Think about it: if your messaging and imagery doesn’t look and feel inclusive, a guest may be deterred from your event before they’ve even had the chance to check it out in person.
On RSVP forms, you can ask for guests’ gender pronouns (e.g., he, she, they), but only ask for their gender if it’s necessary for the event. If asking for gender, your first instinct might be to include “male,” “female,” and “other” as the options — but for someone who is transgender or gender non-conforming, the term “other” can be reductive and make people feel excluded. (This is also a form of “othering”).
Instead, provide a blank write-in field so guests can type in what they want for gender, and you can still capture the information you need. And if you need to ask for honorifics, include the standard options like Mr., Mrs., Ms., Dr. Rev., etc. along with the gender-neutral honorific Mx.