Three dopey teens were busted early yesterday after they were spotted climbing along the beams of the Williamsburg Bridge and hanging over the edge of the roadway while a friend took pictures, police said.

Transit cops found Tatevik Zakaryan, 17, Ana Ivdina, 16, and Bauyrzhan Ilyassov, 16, allegedly horsing around on the span 135 feet above the East River just before at 6 a.m.