Ladybug is a phone that appears Diary of a Wimpy Kid: Dog Days, both the book and movie. It was a present from Susan and Frank on Greg's birthday. The phone only has 2 buttons, one to call home, and one to call 911, in the case of emergency. Later on, Greg used it to call the police, thinking that his dad was going to sell him, but he was actually taking him to a baseball game. It is later mentioned in Hard Luck.
- It appears to be a parody of the Firefly mobile phone.
- Greg is shown to not take it to school. This is possibly due to him not wanting to get teased by his classmates.