She tells the National Enquirer, "My brother was switching ears with his transistor radio and I said, 'You can't do that. You can only hear out of one ear.' And he was like, 'No. I hear out of both!'
"I said, 'Mom, I only hear out of one ear! And we went to the doctor. It's nerve deafness, probably from a very high fever when I was a baby."
But Jane Lynch certainly hasn't let a hearing disability affect her acting career - she currently stars on the award-winning hit TV show Glee.
She adds, "I shoot the sound into my one good ear. If I think about it, I can straighten it out, but a hearing aid wouldn't even help (that ear). It's stone-cold deaf."