The two, who haven't been spotted together in almost three months, have yet to speak publically about their relationship.
Mendes' latest interview, for Violet Grey, was no exception.
The brunette beauty remained mum on her leading man despite the reporter's best efforts to get her to open up.
When asked where she would like to die, the 39-year-old replied, "In a bowl of penne arrabiata…or what about Disneyland, isn't that the happiest place on earth?"
This isn't the first time that the star has gotten cold feet when discussing her boyfriend.
During a chat with The Edit, Mendes admitted that she's not good at speaking about the love in her life.
"I'm sorry. I'm shutting down," she exclaimed when asked about her relationship with the 32-year-old actor.
"I'm such a weirdo. I literally lose my ability to speak—and you were doing so well," she told the reporter.
Gosling also has a similarly private sensibility about him.
During a chat with the Spanish newspaper, La Vanguardia, he explained that he's never inclined to Google himself.
"I don't read what people say of me on the Internet," he said. "The Internet is like a minefield to me. I just simply don't enter there."
Mendes was seen walking Gosling's dog in late October and the two were seen taking a stroll earlier that same month.
Neither, however, have been spotted together since—sparking rumors that the good-looking duo have actually split.
These two are such a mystery!