Mermaid Halter Sweetheart Sequined Long Backless Prom Dresses with Hig 27dress Jenna Ortega in Backless Hooded Gown at Saint Laurent Hypebae Amarra 87317 Mermaid Prom Dress Emerald Size 2 8 Long Embellished Lace Mermaid Glass Slipper Formals @jennaortega sure knows how to make a red carpet entrance. The Wednesday star attended the Academy Museum Gala in a backless dress from designer @gracelingofficial featuring a metal bodice and satin I Can't Stop Thinking About Jenna Ortega's 'Wednesday' Red Carpet Beauty Looks