The event, titled "An Uncanny Likeness," took place in the Simon Lee Gallery on the Upper East Side, and drew a rather exclusive crowd.
Dauriac, a journalist among other things, was one of the organizers of the event, and could be seen posing alongside his wife in a room full of their friends.
However, their united front does not mean they are still together. A source close to Dauriac told People the couple has been separated since last summer.
Someone else in Dauriac's circle elaborated, saying,
I've been expecting this for some time. Romain and Scarlett has never made sense to me. They aren't equals. There's always been something wrong with this picture.
Before Wednesday, Johansson was last seen Saturday, at the Women's March on Washington, notably missing her wedding ring.
Her speech on Planned Parenthood and appeal to our new president made headlines for its candor and generally inspirational nature.
Johansson and Dauriac came out as a couple in October 2012, and less than a year later, Johansson was wearing a massive art deco engagement ring.
The duo share a 2-year-old daughter, Rose Dorothy, and secretly got married just after her birth in 2014.
The actress gushed to People earlier in 2014 about her then-fiancé, saying,
I love his brain more than anything... He does all the sweet gestures for me. He's a gentleman.
The cause of the split is unknown, however, they remain tied together through their popcorn brand Yummy Pop.
Back in December, the two were side-by-side at the grand opening of their storefront in the Théatre du Gymnase in Paris.
Johansson's first marriage was to Ryan Reynolds from 2008 to 2010.