Who is behind the voice of Siri?

Siri is iPhone's virtual assistant, but who is the woman behind the famous voice?

"The first time I actually heard my voice as Siri was when my friend emailed me and said, 'Isn't this you?,'" voice actor Susan Bennett told CNN. "And because I didn't have the newest version of the iPhone, I went to the Apple site, and that's when I heard the voice and I went, 'Oh, that is me!'"

Bennett started her life as a machine quite young. She was the voice of Tillie the All-Time Teller, the first ATM.

The Siri voices were recorded in July 2005 -- four hours a day for the whole month.

"So when I recorded those voices, I had absolutely no idea where they would end up," Bennett said.

Bennett's voice can be heard on many GPS and telephone systems, and even in some airports. But finding out she was the voice behind Siri was surprising for Bennett.

"When I first discovered that was my voice, to be honest, it was a little creepy. I'm used to hearing my voice maybe in the airport," she said. "But this real thing that you can interact with in your hand was a little, it took some time for me to get used to it. She and I are friends now."

CNN contributed to this story.

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