The recently single Oscar-winner stepped out in New York on Saturday without her shiny diamond ring.
Winslet announced earlier this month that she and Sam Mendes had called it quits on their marriage of seven years.
In a statement, a UK law firm said the split was "entirely amicable and is by mutual agreement. Both parties are fully committed to the future joint parenting of their children."
Winslet and Mendes, who worked together on 2008's "Revolutionary Road," have a 6-year-old son, Joe. Winslet also has a 9-year-old daughter from her first marriage.