This theory is the belief that every single Pixar movie, from Toy Story all the way to Coco and most recently Toy Story 4 belong in the same universe.
The Disney+ streaming service is finally set to launch next month with a whole host of Pixar content. But which of the studio's movies are missing?
Here are some of the best, and most surprising, deleted scenes from Pixar movies, such as the Cars movie's incredibly dark, vehicle graveyard.
Voice actor John Ratzenberger is Pixar's good luck charm and has appeared in every single one of their movies. Here's every role he's had.
Pixar has released 21 movies in 24 years, and we've ranked them all - from the first Toy Story in 1995, all the way to this year's Toy Story 4.
The franchise has been hugely successful for Pixar but will Cars 4 ever happen? The movies have grossed over $1 billion worldwide.
Cars 3 keeps Lightning McQueen's story moving, dropping evern more Pixar easter eggs and secret references along the way.
Cars is the most widely derided film in the Pixar canon, but is it really as bad as people say, or is it just misunderstood?
Lightning McQueen's story arc comes to an end in Pixar's Cars 3 as he gets help from a new character who may take his place.
Sphero unveils Ultimate Lightning McQueen, the app-enabled, interactive race car that fully animates, talks, and comes to life.
Pixar reveals how Cars 3's new lead character Cruz Ramirez was designed, her role and importance in the film and to Lightning McQueen.
Pixar staff explain how Lightning McQueen's next-gen rival, Jackson Storm, was created from scratch to be his ultimate nemesis.
Disney has released a short teaser for Cars 3 that announces the next trailer for the Pixar threequel will arrive tomorrow.
Disney/Pixar reveals plans to debut a new trailer for Cars 3 during next week's college football playoff national championship.
Pixar head honcho John Lasseter compares Cars 3 to the original Cars, with a Lightning McQueen story that has a 'deep emotion'.
Disney/Pixar has released concept art for Cars 3, sharing a first-look at Cruz Ramirez: Lightning McQueen's (Owen Wilson) new trainer in the film.
These tiny details in Disney/Pixar movies may have been missed by most audiences, but show the movies are more connected than you'd think.
Sometimes, a fan theory can turn a classic movie into an incredible one, thinking up twists or hidden messages that put the writers to shame.
Pixar Animation Studios has spun out hundreds of animated characters, but there are only 20 that top the charts as the best.
Edna Mode, Bruce, the witch from Brave- who else is ready to go from supporting character to star? Check out these 12 spinoff ready Pixar characters.