20 years later, fans can't get enough of "Titanic." And Kate Winslet just gave them a brand new bit of trivia to chew on.

While appearing on "The Late Show With Stephen Colbert" Thursday night to promote her new film, "Wonder Wheel," she spilled the beans -- for the first time ever in public, according to the Oscar-winning actress -- on a secret about her audition for the James Cameron blockbuster. Her scene partner wasn't Leo, it was Matthew McConaughey.

"I auditioned with Matthew, isn't that weird? Never said that in public before!" Winslet revealed, when asked about Paramount wanting the "Dallas Buyers Club" star over Leo for the role of Jack.

Watch the interview below:While remarking that the audition with Mr. Alright, Alright, Alright was fantastic, Winslet knows that casting him would have obviously changed things, and that the movie we all love "would have been a totally different film."

Maybe she would have made room on that door for the McConaughey's Jack, amirite?! (Sorry not sorry.)

"Wonder Wheel" plays in select theaters now, and "Titanic" returns to theaters Dec. 1, 2017 for a one-week limited engagement celebrating its 20th anniversary.