Students who double major have higher earnings and are more satisfied with their educational experience in college than those who graduate with a single major. In this study, the authors examine the extent to which a student's experience with academic acceleration programs in high school, specifically successful participation in the Advanced Placement Program® (AP®), defined here as scoring a 3 or higher on an AP Exam, is related to double major completion after controlling for academic preparation, motivation to double major, student background characteristics, and postsecondary institutional characteristics. Findings show that students who obtain a score of 3 or higher on an AP Exam are more likely to double major than students who do not earn a 3 or higher on any AP Exam. Furthermore, the greater the number of AP Exams with a score of 3 or higher, the higher the likelihood of the student double majoring. Findings also show that all students graduating within four years, both students who scored a 3 or higher on more than one AP Exam and those who did not, are more likely to complete a double major than students who take more time to complete their degree. This indicates that students are not using additional time in college to acquire more credentials.