So you're most excited to see Marylou!
Marylou is based on the real life person, LuAne Henderson. She married Neal Cassady (Dean in the book) in 1945 aged 16. LuAnne and Neal moved to New York City in 1947 where they met Jack Kerouac. Neal and LuAnne's marriage was annulled in 1947, to permit Neal to marry Carolyn who was pregnant with his child. Despite Neal being remarried, she continued to have a relationship with him.
Some quotes from chapter 1 of OTR about Marylou:
'Then news came that Dean was out of reform school and was coming to New York for the first time; also there was talk that he had just married a girl called Marylou.'
'Dean had arrived the night before, the first time in New York, with his beautiful little sharp chick Marylou'
'I went to the cold-water flat with the boys, and Dean came to the door in his shorts. Marylou was jumping off the couch'
'Marylou was a pretty blonde with immense ringlets of hair like a sea of golden tresses; she sat there on the edge of the couch with her hands hanging in her lap and her smoky blue country eyes fixed in a wide stare because she was in an evil gray New York pad that she’d heard about back West, and waiting like a longbodied emaciated Modigliani surrealist woman in a serious room.'
Kristen Stewart will be playing Marylou in the film. And instead of going blonde, she will go back to her natural hair colour which she described as strawberry-blonde.
Pictures of LuAnne Henderson: