Kevin Federline and girlfriend Victoria Prince welcomed a daughter, Jordan Kay, on Monday, People reports.
This is the fifth child for Federline, 33, and the first for Prince. The couple began dating in late 2008.
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The dancer-rapper has two sons with ex-wife Britney Spears: Sean Preston, 5, and Jayden, 4. He has also one son, 7-year-old Kaleb, and one daughter, 10-year-old Kori, with ex-fiancé Shar Jackson.
Federline most recently appeared on the seventh season of VH1's Celebrity Fit Club, during which he lost 30 lbs.