Adelaide woman pulls over to answer call which tells her she's won $3.3m

An Adelaide woman pulled her car onto the side of the road to answer a phone call to find out she had just become a multi-millionaire.

The woman, in her 60s from Melrose Park in the city, scooped $3.3m on the lottery.

"You've made my day; you've made my life," The Lott said she replied to them.

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The Powerball lottery is the biggest ever.

"I'm just on the side of the road. I've pulled over. I don't think I can drive home at the moment," she said.

The woman was one of three winners in the Saturday X Lotto draw, with the other people in her car apparently erupting into celebration when they realised what was going on.

She said she had been playing the lottery for "decades".

She plans to retire early and spend her windfall on holidays.