As one of the highest-grossing movies of all time, Titanic has got to be one of James Cameron's greatest pieces of directing. After scraping a ticket onto the Titanic, Jack Dawson (Leonardo DiCaprio) soon becomes close with Rose DeWitt Bukater (Kate Winslet). Audiences were gripped by the film’s central romance, as Jack’s artistic expression helped him win over Rose’s heart.
A part of Jack's charm is his drawing skills, as he often carries around his sketchbook and allows Rose to look at it, showing off his most intimate drawings. Yet some interesting behind-the-scenes interviews have revealed that Cameron was the one with the artistic talent all along.
James Cameron's Artistic Background Informed the Making of Titanic
Perhaps the most famous and frequently quoted scene in Titanic is when Rose asks Jack to "draw me like one of your French girls" as she wears nothing but a necklace. It's a very romantic scene as Jack sketches a naked Rose. And yet, as the camera shows Jack's sketching hand, there's something different that most people won't recognize. The drawing hand isn't DiCaprio's; it's actually Cameron's.
In Cameron's early life he was always drawing and wanted to become an artist. Books of his art have even been released, such as Tech Noir: The Art of James Cameron. As the name suggests, the book features many illustrations of science-fiction scenes and characters. Many of the drawings look familiar, as some went on to influence his later work. Cameron often sketches concept art for his movies, such as the classic design of The Terminator and the Power-Loader Ripley uses in Aliens.
James Cameron Draws Rose and More in Titanic 
Having Cameron draw the numerous sketches seen in Titanic not only ensures Jack's art style remains consistent but also allows the director to put even more of his influence into the film. Even during an interview on The Late Show with Stephen Colbert, Winslet revealed that Cameron did in fact draw the naked sketch while she wore a bathing suit.
Though this tidbit of behind-the-scenes information may break the immersion for some, it's interesting to get an insight into the tricks and movie magic used to make everything feel natural. It's completely believable that Jack is a sketch artist in Titanic even when it's actually the director continuing to show off his talents.