TMZ said Linde cited irreconcilable differences as the reason for the split in papers filed Sept. 23 in Los Angeles.
She is seeking spousal support and joint legal and physical custody of their son and daughter, the report said.
"This was a mutual decision," Marsden's representative said in a statement issued to TMZ. "They are committed to raising their kids together and remain great friends."
Marsden is best known for his roles in the "X-Men" films and movie musical "Hairspray."
Pot vending machine to debut
Pistorius testifies he didn't consciously pull trigger when he shot girlfriend