She included a throwback video featuring their late father, Steve Irwin, and showing how Robert got his unique nickname.

Wildlife Warrior and Dancing with the Stars champion Robert Irwin is celebrating his 22nd birthday, sparking an outpouring of ...

Robert also got some birthday love from Chandler Powell, who called him a " great brother-in-law ," Tom Bergeron, DWTS partner Witney Carson and his sister Bindi Irwin, who shared a video of her ...