Miranda Kerr's biggest fear

Reuters

Supermodel Miranda Kerr

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Miranda Kerr lives in fear of falling on the catwalk.

The 26-year-old model - who has starred in advertising campaigns for Victoria's Secret and Maybelline New York cosmetics - says strutting down "slippery" surfaces and posing in outlandish outfits is daunting.

She explained: "Every catwalk is different. Sometimes they are really slippery. Some have glitter that's a couple of inches thick. It gets all up in your toes. It's a little bit messy - glitter flying everywhere."

As well as battling her fashion show fears, the Australian beauty, who is dating actor Orlando Bloom, says the worst part of her job is having to look good at all times - even in extreme weather conditions.

She added: "If it rains we still have to work and that can be miserable. It's hard to look sexy in the rain."

Earlier this year, the lingerie model revealed she was desperate to follow in her boyfriend's footsteps and try her hand at acting.

She said: "If there was a good role that I found interesting I would definitely try acting. I wouldn't want to be in one of those cliched roles, but I would do something that would be a little more interesting."