Hi Rachel! You can definitely double major in college. I like to think of your first major as your main interest and one that you know can help pay the bills. Your second major (or minor) can be somewhat of a hobby or side interest - so in your case that would be musical theater it seems. I majored in human and organizational development as my first major and Asian studies as my second major! Just make sure that you are able to meet the requirements of a double major (so the required courses for both) and any liberal core your college or university may have. I found that using the summer before you enter college to plan out your courses (which courses to take when) is super helpful and will keep you on track for graduation!