Seth Rogen HATED Zac Efron When They First Met -- Find Out What Changed His Mind!

Before they were best buds making comedy gold in Neighbors, Zac Efron and Seth Rogen were NOT friends.
While promoting Neighbors 2: Sorority Rising, Zac stopped by Late Night Thursday, where he revealed to Seth Meyers the first-ever meeting between himself and the Pineapple Express star.
Related: Chloë Grace Moretz Had A Deleted Neighbors 2 Sex Scene With Zac! Um, WHAT?!
While the rising High School Musical star was fangirling, Zac’s future costar totally admitted to hating his beautiful guts!
Ch-ch-check out the interview (below) and see Seth & Zac team up once again in Neighbors 2 in theaters now!

[Image via NBC.]