Robert Irwin is getting some extra-special Dancing With the Stars rehearsal time before hitting the ballroom. "Grace is making sure my dance training continues when I get home. She is prepped and ready for season 50 of @dancingwiththestars," Robert, 21, wrote via Instagram on Saturday, September 20, referring to his sister Bindi Irwin's 4-year-old daughter. "Seriously so grateful I have my family here supporting me on this DWTS journey." Robert uploaded footage showing the young conservationist holding Grace's hand as he went over the kicks and flicks from his premiere night jive.