The Kings of Leon frontman popped the question to model girlfriend Lily Aldridge over the weekend and while she happily accepted his proposal, they are yet to set a date for the nuptials.
The couple have been dating since 2007 and friends say they are perfect for each other.
While the `Sex on Fire` rocker is now in a happy relationship, his brother and bandmate Nathan Followill once revealed how they used to have "guiltless sex" with groupies.
The band - comprising of Caleb, Nathan and their brother Jared and their cousin Matthew Followill - admitted travelling with their preacher father Leon helped them prepare for their sinful lifestyle.
Nathan said: "I think it definitely prepared us for this. I mean, I don`t think just anyone could handle being away from home for 10 months out of the year, but you know it kind of helped us not to attach ourselves to a certain place for too long because we knew we were going to have to up and leave.
"So early on in our career it was perfect for the guiltless sex with the groupies, but now that we all have relationships it`s a little tough."