Are announcements sent to newly added guests automatically?

No, announcements (invitations, save the dates, etc) are not sent to guests automatically.

If you send an announcement to guests, then add more guests or update email addresses, we do not send these automatically. For the simple reason that we do not want to assume which announcements your guests will and won't receive – that's your decision.

To send announcements to newly added or updated guests/parties, you can return to the announcement, and send again at the 'Send' step. If you get stuck, you can follow these instructions.