The duo looked happy and friendly as they spotted together while posing for some photographs at the Simon Lee Gallery event, reported AceShowbiz.
The "Lucy" actress, who donned an all-black ensemble for the exhibition, was apparently not wearing her wedding ring.
Johansson, 32, and Dauriac, 34, got married secretly in 2014 shortly after welcoming their daughter, Rose Dorothy.
The pair reportedly decided to end their romantic relationship last summer.
Johnasson was previously married to "Deadpool" star Ryan Reynolds from 2008 to 2010.
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