The actress, who has been with the show since 2008, explained that "slightly older" men seem to find Julie particularly appealing.
"It's really weird, but I always get men over the age of 40 coming up to me and saying, 'I love Julie, I love Julie'. Not the wives - it's always the husbands who are fond of her," Cavanagh told The Mirror.
"I get lots of lorry drivers talking to me, too. And I get fan mail from men as well. I had a really lovely poem from a man who was slightly in love with Julie. He must have been over 60 and it was really nice.
"So I think there's something going on there with Julie and the male psyche. She's a throwback to a time when women behaved themselves, one of those old-fashioned women who'd do anything to keep her man happy. Maybe that appeals to slightly older men.
"And she's always nicely turned out. Sometimes men like it when women make an effort and we don't always make so much of an effort nowadays."
"These things are out of our hands, but I would love them to get married - it would be hilarious," she said.
Cavanagh was last month confirmed as part of the lineup for Coronation Street's new musical Street of Dreams, which has its premiere in Manchester in March.
> Coronation Street musical is brilliant, says Paul O'Grady
> Coronation Street musical is a ten-star show, says Julie Goodyear
> Coronation Street musical to have big surprises, says Kevin Kennedy
> Read more Coronation Street spoilers and news
Watch a preview of Friday night's Coronation Street double bill in the video below: