Lydia was the third ex-wife of Gary Heffley. It is unknown why they divorced. She is first mentioned in Diary of a Wimpy Kid when Greg thanks her for getting him an encyclopedia for Christmas. When she and Gary got married, her head was taped over the head of Charlene on the picture of Gary's second wedding, by Susan. In Gary's fourth wedding Sonja told him to get rid of her name as a tattoo on his arm, but he couldn't pay enough money, so he instead changed it to "I am not in love with Lydia anymore". Lydia was in cursive and had a heart instead of a dot. The rest was a simple black font.