Hold on to your diamond earrings: A 1980s icon and member of the Brat Pack is coming to Denver Comic Con. Molly Ringwald, star of the John Hughes films “Pretty in Pink,” “Sixteen Candles” and “The Breakfast Club,” will appear Saturday and Sunday of Con weekend. Ringwald is the third “Riverdale” cast member to be added to the Denver event, joining her on-screen former beau Luke Perry and Queen Bee Cheryl Blossom, known IRL as Madelaine Petsch.