The actress feared that she had performed badly after auditioning for the part of Donna Freedman and soon jetted off for a holiday without waiting to hear back from the show's bosses.
Robbie told the Herald Sun: "I went to Canada to go snowboarding with my boyfriend. I didn't give it a moment's thought. I thought I'd done a really bad audition, so I just walked out and thought, 'Oh well'.
"But you know, you get one phone call and it changes your life. We'd been in Canada for two days and I got that call and I sort of said, 'Bye, I guess I'm leaving for home'. But I did manage one day of snowboarding."
Discussing her eccentric alter ego, she continued: "[Donna's] really dramatic, but I guess I can be a bit dramatic at times. Playing her is always fun - it's a huge amount of fun - but it is exhausting. It's often 15 hours a day and there are times that you get sick because you are so run down."
The 19-year-old recently spoke of how she would like to land a 'grittier' role in the future.