There are a variety of reasons you may want to revamp that old dress of yours; you’re getting tired of it, you want a new look, or the dress is actually torn or stained along the bottom. This method is really quite easy, and peplums are so hot right now you’ll be on-trend in no time!
1. Start with a dress that has a fitted or elastic natural waistline*.
*Your natural waistline is usually the narrowest part of the abdomen, a few inches above the hips.

2. Spread the skirt and make a rounded cut about 7″-10″ below the waistline. 
3. Finish the hems by using the straight stitch on your sewing machine OR create an invisible, hand-stitched hem using the following slip-stitch.
 
Creating a slip stitch: (in general you will want to hem the lining separately.)
A. Iron or pin the hemline flat about 1/2″ on the inside of the garment.
B. Use a single thread that matches the color of your garment. Sew up and down evenly as shown below, making sure not to gather the fabric. Your long stitches will be on the underside of the garment, leaving tiny (nearly invisible) stitches on the outside!
 

Now all you have to think about is how you’re going to style your new top!