Hi! I am a bride-to-be as of 06/13/11

My fiance and I have been telling as many people as we can about our engagement. Between the two of us I think we have told just about all of our friends and family and possibly even a few random strangers! That being said, are engagement photo's/announcements necessary? I am new to the wedding scene and I am not sure if I still need to get these done? Help! Please and thank you!!