Robert Irwin says it's been 'incredibly difficult' growing up without a father after losing his dad at just three years of age

Robert Irwin's girlfriend Rorie Buckey leads birthday tributes as he celebrates his 20th birthday... amid rumours he's about to propose: 'You're my everything'

Robert Irwin recreates famous photo taken at Australia Zoo 15 years later

Robert Irwin shares loved-up photo with girlfriend Rorie Buckey... after breaking silence on engagement rumours