Judith Viorst

When Alexander wakes up with gum in his hair, he thinks that maybe it's going to be a bad day. When he trips on the skateboard by his bed and drops his sweater in the sink, he knows it's going to be even worse than he thought. His brothers find fabulous prizes in their cereal boxes; he finds cereal. His best friends get fancy desserts in their lunch boxes; Mom forgets dessert. From being scrunched in the car on the way to school all the way to lima...

Alexander could tell it was going to be a terrible, horrible, no good, very bad day. He went to sleep with gum in his mouth and woke up with gum in his hair. When he got out of bed, he tripped over his skateboard and by mistake dropped his sweater in the sink while the water was running. He could tell it was going to be a terrible, horrible, no good, very bad day. It was a terrible, horrible, no good, very bad day. Nothing at all was right. Everything...

Based on the book, this movie follows the exploits of Alexander as he experiences the most terrible and horrible day of his young life and wonders if bad things only happen to him. But he discovers he's not alone when his dad, mom and family live through their own terrible and hilarious day.