The Waltz is the oldest of the ballroom dances, dating from the middle of the Eighteenth Century. It is done Napoleon's invading solders spread the waltz from Germany to Paris; then the dance glided across the channel to England and finally made its way to the United States. The waltz is done in triple time and performed in a closed position.
Below is the waltz and quickstep scene from the movie "Shall We Dance"
The following scene is from the movie "Shall We Dance". The dancer in blue (around 2:18) attended Stevenson High School and Brigham Young University in Utah before becoming a professional ballroom dancer.