Mabel was born on August 31, 1999, five minutes before her twin brother, Dipper. According to her, her first word was "unicorn." She claims to have shown a "natural gift" for art since she was two years old. She and Dipper were raised unreligiously, but celebrate all holidays at her insistence. Since the age of three, Mabel has celebrated Halloween in Piedmont with Dipper. At age nine, she won a mini-golf tournament.