"Who are we going to run into?'" Little did he know.
Chris and Margot soon got stuck into the competition, offering their best Crocodile Dundee impressions, for which they tied.
"I'm not kidding, I'm not kidding", Robbie tells the audience through laughter. And "Who would you prefer, Chris or Liam?"
The actress told the host a cringe-worthy account of how she accidentally met both Ellen herself and former POTUS Barack Obama while honeymooning with her hubby Tom Ackerley in Tahiti. "I was like, 'Babe, you cannot wear those shorts.I can see everything".
Margot and her producer hubby at the Golden Globes.
That would be DeGeneres, de Rossi and Obama, who was on the island working on his book.
"Since Margot Robbie and Chris Hemsworth are both Australian, we're gonna play a trivia game", DeGeneres said, dubbing the challenge "Ellen's Australian Boxers".
The "starstruck" pair introduced themselves then everyone joined a stretching class where Ackerley was urged by the trainer to lunge deeper.
The two stars went head-to-head for the crown of "Best Aussie" on The Ellen Degeneres Show overnight, where the victor was awarded - what else - a jar of Vegemite.
"We were like, "Oh, I don't really wanna work out, but I guess we could do something at the gym". And he's dying, and I'm crying so much I'm about to crack a rib", she joked.
Massive earthquake centered in the Caribbean; tsunami advisory lifted for US territories
The northern coast of Honduras closest to the quake's epicenter is sparsely populated, with much of it covered by nature reserves. The tremor was about 25 miles (44 kilometers) from Honduras' Swan Islands, which are unpopulated except for small navy post.