She doesn't usually talk openly about her relationship with Ryan Gosling, but Eva Mendes may have dropped a hint that she and the actor, who became parents in September, have secretly tied the knot.

Ryan Gosling Denies Coining 'Hey Girl' Phrase

While launching her new cosmetic line, Circa, Mendes spoke with Extra's A.J. Calloway about motherhood and her style secrets-and revealed her number one style secret that many have taken to be her secret for keeping Gosling's interest.

"No like, sweatpants at home?" Calloway asked her at one point during the interview.

Eva Mendes Opens Up On 'Bonding' With Her Daughter

"No, no, no, no," Mendes replied. "Sweatpants, no, no, no. You can't do sweatpants. No. Ladies, number one cause of divorce in America is sweatpants!"

And while Mendes was somewhat joking, it has caused speculation on whether or not she was divulging her relationship secret-and potentially, revealing it was a hint that could keep her possible marriage intact.

Though if the couple is married, they aren't likely to announce it anytime soon, and many have wondered, if they aren't already wed, if they were considering tying the knot soon, now that their daughter, Esmeralda, is six months old.

Reports surfaced earlier this month that Mendes was planning a wedding to Gosling, and that he was more than happy to go along with her plans-and the two were allegedly set to announce an official engagement this summer.

"They'll get formally engaged over the summer and don't want a long engagement," sources said at the time.

Tags: Eva Mendes ryan gosling