There's a new princess of Leon!
The child weighed in at 7 pounds and 13 oz. for the couple, who wed just more than three years ago.
A band rep told People that 33-year-old Followill, 28-year-old Baylin "and baby are doing well, and are so in love!"
The band, whose hits include Sex on Fire, Use Somebody and Notion, is expected to release an album in 2013.
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