The 36-year-old actor, who is nominated for his role in musical "La La Land," said he still doesn't know if his partner will join him on what can be the biggest nights of his life, reported Entertainment Tonight.
"Oh, I'm not sure. It's still a little while away," Gosling said when asked if his longtime love would be joining him at the Oscars.
The father of two also shared that Mendes came up with one of most memorable lines of "La La Land".
"She was kidding, but it's a funny thing to say... I loved when she said it, because it's funny enough to have some truth to it, you know? But it's obviously a joke, so it just seemed appropriate for the movie.