Stern shot himself in the head at a shooting range, reports TMZ.
Sources told the site that Cleary told law enforcement they were in the process of getting a divorce.
Katie was a contestant on “America’s Next Top Model” and a briefcase model on “Deal or No Deal.”
Andrew was on Season 2 of “Millionaire Matchmaker.” The couple appeared together on “Million Dollar Listing.”
Stern was an Internet entrepreneur and co-founder of RipLounge.com.