The fighter secretly married his third wife Lakiha Spicer at a small Las Vegas chapel three years ago, just weeks after his four-year-old daughter Exodus was killed in a freak exercise machine accident at home.
Tyson has now revealed he decided to go ahead with his big day in a bid to deal with his anger over his child's untimely death.
He tells Britain's The Sun newspaper, "After Exodus's death I knew I needed to do something positive and not sit there full of anger. I married the woman of my dreams. She's not dark like me. I want to die with her."
Tyson fathered Exodus with his second wife Monica Turner.