Robert’s older sister, Bindi Irwin, proudly watched from backstage, Instagramming a picture with her family.
WATCH: Robert Irwin Is Already Following in Dad Steve's Footsteps: 'I'm Keen to Do Everything He Did'
“Super excited to be back in #TheTonightShow studio ready for @robertirwinphotography to be on the show again! Proud beyond words of my extraordinary brother. Tune in tonight to see him showing Jimmy Fallon some gorgeous animals!” she captioned the shot.
For more from the Irwin family, watch the clip below!