Margot Robbie in Once Upon a Time in Hollywood

Sony Pictures Releasing

There's one question essentially every "Titanic" fan has had, Margot Robbie included. When she got an opening, she asked her "Once Upon a Time in Hollywood" co-star Leonardo DiCaprio about the infamous door that apparently couldn't fit both Jack and Rose.

Robbie was sitting down with both DiCaprio and Brad Pitt when MTV News' Josh Horowitz brought up the "biggest movie controversy of all time": whether or not the door could have held Jack. DiCaprio wouldn't comment, but Robbie jumped in to say that she had definitely "thought it." She didn't press her co-star to answer whether or not there was room for two, but she did want to know if he had noticed the issue while filming.

"Did you mention it at the time?" Robbie asked. "Were you like, 'Should we make the door smaller so I--'"

DiCaprio jumped in to reiterate his "no comment" stance, so alas, we'll never know. It did make for a funny exchange, though, as you can see below:

While DiCaprio has chosen not to weigh in, his "Titanic" co-star Kate Winslet previously shared that she thinks there was room for Jack.

"I think he could have actually fit on that bit of door," she said on "Jimmy Kimmel Live" in 2016.

Director James Cameron, on the other hand, disagrees. He has said on multiple occasions that the door only could have held Rose and that the story required Jack to die. And yet, the controversy will go on.

[via: MTV News/Instagram; h/t: EW]