Robert Irwin makes red carpet debut with girlfriend at Mission: Impossible premiere in Sydney

Robert Irwin has made a very loved-up red carpet debut with his new girlfriend in Sydney ahead of the Mission: Impossible premiere.

Robert Irwin has made his red carpet debut with new girlfriend Rorie Buckley.

The 19-year-old conservationist and Buckley, who is the niece of late Australian actor Heath Ledger, looked loved-up as they posed outside the International Convention Centre in Sydney ahead of the Mission Impossible: Dead Reckoning premiere on Monday night.

Robert was beaming as he hit the red carpet with his girlfriend. Picture: Matrix Pictures

They colour-coordinated their outfits, dressing all in black. Picture: Matrix Pictures

Irwin looked dapper in a black suit as he wrapped his arms around Buckley, 18, with the pair giggling and appearing to share a private joke.

The pair appeared to share a private joke at one stage. Picture: Lisa Maree Williams/Getty Images

His girlfriend opted for a black long-sleeve dress which featured a midsection cut-out for the glamorous event, which also saw M: I stars Tom Cruise, Simon Pegg and Hayley Atwell walk the red carpet for the franchise’s seventh instalment.

The couple looked chic in black. Picture: Don Arnold/WireImage

They were beaming at the premiere. Picture: Don Arnold/WireImage

M: I stars Simon Pegg, Pom Klementieff, Tom Cruise, Hayley Atwell and Christopher McQuarrie at the Australian premiere. Picture: Mark Metcalfe/Getty Images for Paramount Pictures

The young couple was first spotted together late last year, cuddling on a Queensland beach.

Irwin was photographed with his arms wrapped around Buckley in November, as they ate burgers and watched the sunset.

Buckley, the daughter of Ledger’s sister Kate, was also spotted sitting with her rumoured new boyfriend and his mum, Terri Irwin, at the Australia Zoo crocodile show on his birthday in December.

The pair are currently making their relationship work long-distance, with Buckley based in Perth and Irwin on the Sunshine Coast.

Originally published as Robert Irwin makes red carpet debut with girlfriend at Mission: Impossible premiere in Sydney