Family
- step-mother Lisa Timberlake:
- mother Lynn Harless: Divorced Justin's father c. 1985; remarried; runs an entertainment company called Just-in Time Entertainment
- father Randall Timberlake: Divorced Justin's mother c. 1985; remarried and had two more children with his second wife
- step-father Paul Harless:
- half-brother Steven: Born c. 1998
- half-brother Jonathan: Born c. 1993
Companions
- Companion Jessica Biel: First linked at the Golden Globes in January 2007; rumored to be dating
- Companion Cameron Diaz: Began dating June 2003; split in December 2006
- Britney Spears: appeared together on "The Mickey Mouse Club"; confirmed relationship in 2000; reportedly separated in 2002
