The couple announced to Us Weekly that Aldridge had given birth to the seven-pound, 11-ounce baby at 1 a.m. in Nashville on June 21.
Mom, Dad and baby are happy, healthy and enjoying their new addition, the rep tells Us Weekly.
Aldridge and Followill met at the 2007 Coachella Music and Arts Festival. They got engaged in September 2010.
This is the first baby for the couple, who wed in May 2011 at San Ysidro Ranch in Montecito, Calif. Aldridge wore a custom Vera Wang gown for the ceremony, which was held outdoors with family and friends, according to Us Weekly.
In May, the couple announced the pregnancy. We can't wait to meet the new addition to our family, the couple said in a statement.
The 26-year-old California native is best known for her role as a Victoria's Secret Angel. She began modeling at the age of 17. In 2009, she walked in her first Victoria's Secret Fashion Show and earned her wings the following year.
Aldridge is not the only VS model to recently welcome a baby. Fellow stunner Alessandra Ambrosio gave birth to baby boy, Noah Phoenix, on May 7. Adriana Lima and Marisa Miller both announced they are pregnant and will be expecting babies this year.