Lawrence "Larry" Quinn is the hidden main antagonist of the 2003 live-action film adaptation of The Cat in the Hat. He is the Waldens' pompous next-door neighbor who is determined to both marry Joan for her wealth and money and get rid of Conrad by sending him to military school. His real first name is Lawrence, but he is called Larry for short.
He was portrayed by Alec Baldwin in the film.
A disgusting and unemployed slob, Larry burps in public and has very poor manners. He is the Waldens' next door neighbor, and is in love with Joan and wants to marry her, mainly because Joan is wealthy and has money. Larry is apparently, also allergic to cats, as shown in the film when he sneezes in the presence of the Cat in the Hat.
Larry was born on August 21, 1974 to his mother Sabrina Quinn and Alex. As a child he was spoiled and crude, often burping in public. This continued on to his adulthood. His favorite food is pizza and tacos. When he was 17 and in college, he met Joan and the two fell in love. However, this changed when Joan's son, Conrad, was born. Since then, Larry has been planning to get Conrad out of the way while trying to marry Joan.
Later in the film, Larry found the family's dog again on the street and planned to return him to Joan so she'd hurry home in order get her kids in trouble. Upset about being pulled over by Thing 1 and Thing 2, Larry impatiently hurries to the house, only to fall into purple goop due to "the mother of all messes" coming from the Cat's magic crate. After everything was restored, Larry (now covered in pink stuff) tried to persuade Joan about the events that occurred, but she didn't believe him and then slammed the door in his face.
It is unknown what happened to him afterwards (though in a deleted scene, he is being chased by a mad dog, while repo men are towing his car away). It is possible that, if he plans to stalk Joan or her kids again, she will call the police and have him arrested for stalking and trespassing on her property.