If you've been the subject of an E! True Hollywood Story, then chances are you've made your mark in pop culture.
And that's exactly what Ron Palillo dished to E! about in 2000 when Welcome Back Kotter scored its own THS episode.
"The thing that's really odd about the show is that it's 25 years old now and we still keep in touch…on a pretty regular basis," Palillo said of himself and his fellow former Sweathogs.
He went on to other roles, but Kotter always stayed with him, "for better or worse."
Check out what he told E! about the sitcom's enduring legacy and why he and his costars remained friends through the years.