No! Definitely not required, but if you want to bring a little something, no one's gonna kick you out. For instance, a gift card for a massage or spa service is always popular. Personalized gifts are great, too. For example, a pic of the two of you on a memorable trip in a nice frame.  Whatever you choose, try to make it about her and/or your friendship! (And avoid all the domestic stuff that's (probably) already on the wedding registry.)