- “All right! Let's do this, people! And... animals! And... weird faceless puppet creatures!”
- ―Larry Daley
Larry started off as a man who had trouble finding work, his inventing career did not take off for a while so he decided to work at the Museum of Natural History as a night guard. When he found out that everything came to life he wanted to quit. But then he realised that he needed to protect the Tablet of Ahkmenrah or everything in the museum would turn to dust. Later, the tablet got stolen by Cecil and two other night guards so Larry and the other members of the museum set out to retrieve it. They ended up getting the tablet and restoring it to it's rightful spot in the museum.
Two years later Larry started Daley Devices he invented the Glow-in-the-Dark Flashlight, the Super Big Dog Bone and the Unloseable Keyring. He visited the museum and found out that some exibits were being moved to the federal archives and Dexter was one of those exhibits who took the tablet. Larry traveled to the Smithonian and defeated the evil pharaoh, Kahmunrah.
Larry has a Planetarium exhibit grand opening being spectated Dr. McPhee. But the grand opening goes haywire, creating trouble with his job and McPhee getting fired. He goes home and finds his son, Nic throwing a party and him being a DJ providing music. Larry seeks help from Cecil for information, who informs him that Ahkmenrah's parents are located in London. They save the Tablet but have a little trouble with Sir Lancelot, who is at the British Museum.
- Larry has a son named Nic.
- Larry invented the Glow-in-the-Dark Flashlight, Super Big Dog Bone and the Unloseable Key ring.
- Larry Daley has been the main character in all four films.