Dolly is a minor Peanuts character who has never appeared in the comic strip but who features prominently in the episode "The Wright Brothers at Kitty Hawk" of the animated TV mini-series This is America, Charlie Brown.
She lives in Kitty Hawk, North Carolina and is the cousin of the 1903 version of Linus. She wears a pink dress and has blond hair which she wears in two short pigtails with pink ribbons. Much of the episode in which Dolly appears takes place outdoors, during which time she wears a small pink beret on her head.
Dolly invites Linus to spend the holidays with her. He arrives accompanied by Charlie Brown and their two horse and buggy drivers, Snoopy and Woodstock. Dolly tells the two boys about the Wright brothers and their development of the airplane. She takes them to see Orville and Wilbur Wright's historic first flight on December 17, 1903 and introduces them to Peppermint Patty and Marcie, the Wright brothers' two young assistants.
The character is not referred to as "Dolly van Pelt" in the episode and it is not stated whether she is related to Linus on his mother's or his father's side of the family. Lucy and Rerun do not appear and are not mentioned in the episode. Given that Schulz only considered the events in the comic strip to be canonical and all storyline developments in other media not to be, and given that the entire episode takes place in 1903, Dolly can not truly be said to be related to the van Pelt children who appear in the daily comic strip.