What to wear for your senior portraits? I'm sure a lot of seniors aren't sure about what to wear during your senior portrait session. One great option is your Ring Dance or Prom Dress. Getting all glammed up for your portrait session will make you look and feel gorgeous. You don't always have great photos of yourself in your prom dress, so wearing your formal dress as one of your looks for your senior session is a perfect option. It's also a great excuse to wear your prom dress again.