Kevin and his wife Victoria Prince welcomed a daughter, named Peyton Marie Federline, on 4 April.
Former dancer Kevin officially introduced his little bundle of joy to the world this week via an Instagram picture of daughter Jordan, two, cuddling up to the baby.
"We would like everyone to meet our newest Federline," he wrote. "Peyton Marie Federline. Born 4.4.14, 8lbs 4oz."
Ex-volleyball player Victoria uploaded a photo of her own, alongside the caption: "No words can describe a moment like this... #babypeyton #blessed #family #thefedz."
Little Peyton is Kevin's sixth child. In addition to Peyton and Jordan, his kids with Victoria, he is dad to sons Sean Preston and Jayden James from his marriage to Britney Spears.
He also has son Kaleb and daughter Kori from his relationship with ex-girlfriend Shar Jackson.
Got an iPad or iPhone? Reveal Mag is specially designed to fit!
Celebrities who have welcomed babies in 2014:
Copyright: Rex Features WENN/Matthew Taylor/Daniel Deme/Josiah True/Matthre Taylor/Joe