The couple, who have been together for five years, got married in presence of a small group of family and friends, reported Us Weekly.
"Eva and Ryan have always felt like a married couple. They are infatuated with each other," a source said.
Mendes and Gosling starred in the 2012 drama "The Place Beyond the Pines".
The 35-year-old actor and Mendes, 42 have two daughters - Esmeralda, 2, and Amada, 4 months.
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