Article continues below advertisementBindi and Robert Irwin Were Born 5 Years ApartSource: @bindisueirwin/InstagramSteve and Terri Irwin welcomed Bindi and Robert during their marriage.Bindi and Robert Irwin's bond is a heartfelt testament to the unbreakable force of their close-knit family.The celebrity siblings were born to late wildlife conservationist Steve Irwin and his wife, Terri, in Queensland, Australia. The family welcomed them five years apart: Bindi on July 24, 1998, and Robert on December 1, 2003.