Robert Irwin spoke with Australian publication Stellar magazine about the "heartbreaking" milestone and the challenges he's faced in navigating life without a father.

Robert Irwin is reflecting on father Steve Irwin’s legacy on his 21st birthday. In a new interview, the youngster — who turned a year older on November 30 — explained how he is still mourning his dad almost two decades after the TV star’s tragic passing.

Robert Irwin has paid an emotional tribute to his late father 'The Crocodile Hunter' Steve as he turned 21 and says it can be 'hard to celebrate when someone is missing'

Robert Irwin marked his 21st birthday in the most heartfelt way — by sharing throwback photos of his late father, Steve Irwin.

His children, Bindi Irwin and Robert Irwin, who have both followed in his footsteps, were 8 and 2 years old, respectively, at the time of their father’s death. Now, 18 years after Steve Irwin’s death,