Nevermind, released 25 years ago on Saturday, has sold more than 30 million copies worldwide and includes hit songs like Smells Like Teen Spirit and Come as You Are.
"The anniversary means something to me. It's strange that I did this for five minutes when I was four months old and it became this really iconic image," he said.
"It's cool but weird to be part of something so important that I don't even remember," said Elden.
The original photo of Spencer as a baby was taken by photographer Kirk Weddle in 1991.