Family
- mother Alie Christensen:
- brother Tove Christensen: Born c. 1974
- sister Kaylen Christensen: Born c. 1984
- father David Christensen:
- sister Hejsa Christensen: Born c. 1976; former Junior World Trampoline Champion
Companions
- Companion Sienna Miller: Met while filming "Factory Girl" (2006) and casually dated for a few months; no longer together
- Companion Rachel Bilson: Met while filming "Jumper" (2008); began dating in March 2007; announced their engagement in February 2009
