Having good posture can actually make you appear slimmer in photos -- you just have to know which poses will work best for your figure. Most women can flatter their silhouette by pushing their shoulders back and leaning back slightly on one foot. Always stand up straight and make sure you don't slouch, and, whenever possible, choose standing over sitting in photos. When sitting, remember to cross your legs at the ankles in a ladylike pose that flatters calves and thighs. Lift your chin upwards to elongate your neck, and remember to breathe as your photographer snaps away! In the days leading up to the wedding, don't feel embarrassed if you want to practice smiling and posing in a mirror by yourself. Lock the bathroom door for privacy, relax, and see what feels and looks most natural to you.