Born – January 5, 1987
Denver, Colorado, U.S.

Reality star who appeared on "Laguna Beach" and "The Hills."

Famous for being one-third of a love triangle with Lauren Conrad and Stephen Colletti. Remember that famous love triangle? Yeah, no one else does either.

Has done some acting work in movies like "National Lampoon's Van Wilder: Freshman Year" and on TV shows like "Veronica Mars," where she played a lesbian cheerleader. Which is AWESOME.

Got engaged to NFL quarterback Jay Cutler in 2011, got disengaged from Jay Cutler 3 months later when he called off the engagement, got re-engaged to Jay Cutler 4 months after that, announced that she was pregnant 2 months later. Good luck, you two.

Kristin Cavallari Says She's Not Talking Marriage, Kids With BF Mark Estes

Kristin Cavallari Praises Boyfriend Mark Estes as 'Best Sex' She's Ever Had

Jay Cutler Sells Tennessee Home He Shared with Kristin Cavallari

Kristin Cavallari Gets Hot & Heavy With BF Mark Estes For New Fragrance Ad

Kristin Cavallari Reveals She's Had Breast Implants and Breast Lift

Kristin Cavallari Not Moving in with Mark Estes After Listing Her Home

Kristin Cavallari Lists Nashville Home For Sale, Looking to Score Huge Profit

Kristin Cavallari and Mark Estes Post Sexy Fitness Selfie!

Kristin Cavallari & BF Mark Estes' Loving Stare At Stagecoach

Kristin Cavallari Is Open To Having Kids With Her New Boyfriend Mark Estes

Kristin Cavallari Out For Steamy Date Night with New Boyfriend Mark Estes

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