TMZ has learned Steve Wynn's marriage is over for a second time -- a divorce petition was filed in Clark County Court Las Vegas.
Wynn married Elaine in 1963. They divorced in 1986 and married again in 1991. They have two kids.
Wynn's fortune was estimated at around $3.9 billion, but that was before the economy tanked.
The 67-year-old Wynn and his wife were kidnapping victims -- one of their daughters was taken for ransom in 1993. She was returned after Wynn paid $1.45 million to the kidnappers. The culprits were later caught when they tried to buy a Ferrari with the loot.