The actress posted on her Instagram page a photo of the Paramount Theatre in Austin, where the actor walked the red carpet with co-stars Michael Fassbender, Berenice Marlohe and Rooney Mara at the premiere of their film Song to Song. Mendes was not spotted. She posted a heart emoji in her caption.
The actress has largely stayed away from the spotlight since the birth of her and Gosling's daughters, Esmeralda, 2, and Amada, 11 months.
"What people don't know about me is that I love being home," Mendes told Shape magazine, which features her on its April 2017 cover. "Instead of hitting the red carpet, I'd rather be with our girls."
Matt Winkelmeyer/Getty Images for SXSW
Mendes and Gosling have been together for about six years. They have mostly kept their relationship and family life private and are rarely photographed together.
In fact, they have been snapped together at celebrity events only twice—at the 2015 SXSW Music, Film + Interactive Festival in Austin and at the Toronto premiere of his film The Place Beyond the Pines in 2012.
Mendes hasn't acted for more than three years, instead focusing on her various businesses ventures, such as Circa Beauty, in which she serves as a spokesmodel and creative director, and New York & Company, for whom she has launched branded collections.