1 / 12 2 / 12 3 / 12 4 / 12 5 / 12 6 / 12 7 / 12 8 / 12 9 / 12 10 / 12 11 / 12 12 / 12 ❮ ❯ Basic grammar may tell you the hey is an interjection. when used to specifically address a person (or an audience,) as in your example, the hey there is a vocative adjunct with an.