Nikki Sixx has been with many girls in the past including Lita Ford in the 1980s whom he dated for six years. Later he dated a Canadian singer Vanity for shorter and even included his ups and downs with her in his autobiography.
In 1989 he first married to a Playboy Playmate Brandi Brandt from whom he has three children Gunner Nicholas Six, Decker Nilsson Sixx, and Storm Brieann Sixx. This marriage lasted only for 7 years and soon after separation, he married another playboy playmate Donna D’Erico. From her, he has a daughter Frankie-Jean Sixx.
After few separation and reconciliation with Donna, he finally divorced with her in 2007. Later he was seen with a famous tattoo artist, Kat Von D from 2008 to 2010.
After that, he started dating Courtney Bingham and finally tied the knot with her on March 15, 2014. Since then he has been happily living with her.