Yes, Joely had the height and haughty,occasionally flippant attitude described about Marie Antoinette by contemporaries. She just did not look the most like the queen's portraits because Joely is the wrong weight but she did a very good job with her role,nonetheless.
One of my favorite parts of her portrayal is how she walked past the fake fainting of the Comtess character. This is funny to me as it is very historically correct; according to memoirs at the time, Marie Antoinette ignored people trying to get her attention in this way and also was annoyed when someone she did not know tried to interact with her by accident or on purpose*. Joely played these parts perfectly--as she did when she was refusing communion from the Cardinal or when she was crying with rage and pulling off her jewels after the verdict.
*Unlike the French royals, Marie Antoinette had a more private upbringing in Vienna and did not understand that the French royals encouraged public displays to encourage public affection and respect. For example, the public sometimes encountered the royals walking in the immense gardens at Versailles and Saint Cloud and Marie Antoinette was said to be annoyed if the public crossed her path in this way and was sometimes ungracious. Her husband and his grandfather and other family members were said to be kind to common people who surprised them in this way. Even the supremely haughty founder of Versailles, Louis XIV, was said to aknowledge a member of the public he encountered in his gardens(although he is said to have snobbishly only nodded to common males. He doffed his hat for any woman he met no matter what her station,however).
The large gardens were left open to the public, one could visit Versailles if one was properly dressed and one could watch the Grand Couvert, which was a dinner with all the royal family on display for the public to see. One could also visit the wigs and wardrobe of the king and queen--Marie Antoinette's dresses had two rooms in Versailles. Marie Antoinette was said to hate these intrusions and got to the point that she would only stay a few minutes at the Grand couvert.