Is a "black belt" in karate.
He was voted second in the hottest Aussie guy on television in Australian TV Week reader poll, with Paul O'Brien (Home and Away (1988)) taking first place.
Formerly engaged to Lisa Origliasso from The Veronicas in 2008.
Married actress Jillian Murray in September 2017. They met in October 2010 on the set of Never Back Down 2.
Dean's father, Keith Geyer, and late uncle, Derrick Geyer, appeared in the South African martial arts film Kill or Be Killed (1980). Dean's father was his martial arts teacher.