Darcy is a girl from North Haverbrook who nearly married Bart.
Bart Simpson, who recently acquired a drivers license (legally) despite his young age, approaches Darcy and her group of friends. After telling Darcy that he "has that disease that makes you look like an old man, but they gave me medicine for it and I took too much" Darcy reluctantly believes Bart to be 16. They quickly begin a romantic relationship and she soon proposes marriage. At the Court house, Bart reveals his age, she reveals that she is pregnant, causing Bart to flee (to no avail). However the child is not Bart's. She wants to get married because her parents would be angry with her unwed pregnancy. In an act of uncharacteristic and oddly mature chivalry, Bart agrees to marry Darcy, and they drove to Utah, where marriage restrictions are known to be a 'little' loose. Eventually, Homer, Marge and Darcy's parents catch up with them to stop them, knowing that they are too young to get married. Darcy's mother reveals that she is pregnant herself, and the family agrees to pass the two babies off as twins so as not to reveal Darcy's sin. Darcy and Bart end their relationship, while Bart, (in his own way) assures her they will meet again, to which she agrees.
Bart goes to visit Darcy again, where she is seen living with Jimbo, who cares for her child. She slams the door in Bart's face telling him to "drop dead".