Caleb Followill wants his baby to "come out rocking".

The Kings of Leon musician and his supermodel wife Lily Aldridge are expecting their first child together.

Lily has now entered her third trimester and the couple are preparing for birth.

Caleb wants his child to be exposed to electric guitars as soon as possible.

"We're trying to pick the music to make the birth go smoothly," Caleb told E! Online. "I said Queens of the Stone Age, but she's not into it. I want the baby to come out rocking."

Lily prefers that other genres of music play in the background on her delivery day.

"[Lily] listens to a lot of classical music," Caleb said. "Also, she listens to My Morning Jacket and Neil Young - a lot of more peaceful music, I guess."

Although the couple can't see eye to eye on music, they have harmonious tastes when it comes to decorating. Caleb is thoroughly enjoying creating the baby's nursery with his wife.

"We've slapped some paint on the walls and no shoes in there because we've got white carpet," Caleb gushed. "I'm excited to decorate it with fun little musical posters and things like that."

Lily and Caleb married in May 2011.

Their baby will be born this spring.