Kevin Earl Federline (born March 21, 1978) is an American dancer, rapper, fashion model, and actor. Previously engaged to actress Shar Jackson, Federline is best known for his two-year marriage to pop singer Britney Spears. The couple's divorce was highly publicized, followed by an ongoing legal battle for the custody of their two sons, Sean Preston Federline and Jayden James Federline. As of June 2009, Both parents have joint custody of the children.

Federline was born to parents Mike, a car mechanic, and Julie, a former bank teller from Oregon; the name "Federline" is of German origin. Federline has one brother, Chris. His parents divorced when he was eight years old. When Federline was eleven, he and Chris moved back to his father's Fresno house. Federline dropped out of high school in the ninth grade and soon started dancing with a non-profit organization called Dance Empowerment. Federline later earned a GED.

Federline was a back-up dancer for a number of years for Michael Jackson, Justin Timberlake, Destiny Child, Pink, and LFO.