Instagram/Amber Portwood & Gary Shi Celebrity Teen Mom's Leah Shirley, 17, stuns in a red dress at her high school prom, sharing elegant photos with family and friends. May 6, 2026 AceShowbiz - Leah Shirley, daughter of Teen Mom stars Amber Portwood and Gary Shirley, recently marked a significant milestone by attending her high school prom. Now 17 years old, Leah shared several photos from the event on Instagram on Monday, May 4, captioning them "Prom 2026!! ? #prom." In the images, Leah looked elegant wearing a red embellished halter-neck dress.