The Cotton Blossom, owned by the Hawks family, is a show boat known for musical entertainment traveling down the Mississippi River. Julie LaVerne (Ava Gardner) and her husband, Steve (Robert Sterling), are the leading actors of the show. After a jealous boat hand calls the local police on Julie (who’s father was white and mother black), they’re forced to leave; interracial marriages were forbidden (in the 1890s). Magnolia (Kathryn Grayson), Captain Andy’s (Joe E. Brown) pretty young daughter, becomes the new attraction; she has a great smile, a good voice, and learned much by watching Julie. Her leading man is Gaylord Ravenal (Howard Keel), a charming/handsome gambler, who is impressed w/ her at first sight. The two fall quickly in love and marry, w/o the approval of her mother, Parthy (Agnes Moorhead).
Nolie soon faces reality; gambling means more to her husband than anything. She confronts him after he gambles away their fortune; he leaves in the middle of the night. Nolie runs into two old friends, Ellie May and Frank (Marge and Gower Champion), who sang and danced on the show boat. They’re going to perform at a nightclub; Nolie tags along. None of them know that Julie is working at the same club; she is backstage and recognizes the song Nolie sings. Julie leaves the club abruptly, angering the manager and owner, b/c she hears that Nolie needs a job.
A few yeard later, Julie meets Gaylord on a gambling boat, and realizes that he’s Nolie’s runaway husband. Julie gives him a piece of her mind, and shows him an ad w/ the captain, Nolie, and his little daughter. Gaylord swears that he never knew he had a child. Julie begs him, if he ever sees her old friend, to never tell how low she has sunk. Gaylord decides to go to Natchez (where the show boat is docked) and seek forgiveness from his family.
I’ve seen this colorful MGM musical (written by Jerome Kern and Oscar Hammerstein II) maybe 3 times. I recall loving the songs (and having the CD); my favorite songs are “Ol’ Man River” and “Life Upon the Wicked Stage.” Looking at it today (on TCM), there are some pretty good performances (esp. from Gardner). The role of Julie (who passes as white) is tragic, though she is beautiful, talented, and loyal (esp. to Steve, who eventually leaves her). She turns to alcohol and her singing suffers. At the end, Julie is left w/ nothing, b/c this society has no place for her.
 Ava is, as always, ridiculously and insanely gorgeous. In fact, I would have liked to have seen more of her than I did. It’s a stretch for a white woman to play a bi-racial woman, but she did it with what seemed like such ease. She accompanies so much with a look (which is evident as she watches Gay and Nolie sail off together with Kim — you all know what I’m talking about).
 Now for Marge & Gower Champion: who couldn’t love them? Gower is this sort of… fluid-like creature with a stature and grace like Fred Astaire, but instead of Astaire’s “lanky movements” that defined his style, he somehow executes the more athletic, brisk movements that defined Gene Kelly’s style. And Marge has to be just about the cutest little person I have ever seen (great facial expressions!) and one of the most talented dancers… I’ve ever seen grace a screen. “I Could Fall Back on You” and “Life Upon the Wicked Stage” are two of the most outstanding moments in the movie. You’ll love them.
 Musically of course, the film is a masterpiece and though my favourite tune is “Make Believe”, I was extremely impressed by the version of Ol Man River sung by the actor William Warfield who must have had one of the most brilliant voices I have ever hear! I confess to never having heard of this gentleman prior to seeing the film and had imagined the singer to be Paul Robeson.
-Excerpts from IMDB reviews
Some Trivia Behind the Film
- The original production of Showboat opened in the Ziegfeld Theater on December 27, 1927 and ran for 572 performances.
- Even though the character of “Magnolia” is supposed to look up to “Julie” in an older-sister type of relationship, in reality, Kathryn Grayson and Ava Gardner were born in the same year.
- The Breen Censorship Office tried to raise an objection against the use of the “miscegenation sequence,” but they were unable to do so because the 1936 film had already used it (setting a precedent).
- Lena Horne mentions in her biography that she wanted to do the role of Julie badly, but only got as far as performing a single number in the “Clouds” film in the opening “Show Boat” vignette. America was still a segregated nation in 1950; interracial romance was taboo onscreen.