with that "baywatch" secret revealed. The hoff and the rest of the cast reuniting and spilling on the hidden clause in their contracts. Abc's cecilia vega has the story. Reporter: It was the show... See More
with that "baywatch" secret revealed. The hoff and the rest of the cast reuniting and spilling on the hidden clause in their contracts. Abc's cecilia vega has the story. Reporter: It was the show famous for rock-hard bodies. And who could forget those bathing suits? Now, some cast members are spilling secrets in a reunion on "entertainment tonight," saying they had to look that good because a weight clause in their contracts prohibited them from gaining or losing more than five pounds. You kind of didn't have a choice. You have to be in shape. It was in my contract. I did not have that. I never had one. I did. Reporter: But nicole eggert confesses that along with the slow-motion runs on the beach, there was some real-life drama. Yeah. I think she got competitive and more women were going for that look. And wanted to be the hottest and the sexiest. Just cattiness of who got more air play. Or who booked this magazine. Who did this photo shoot? Reporter: So, friends on-screen? Off-screen? I think there was cattiness. You're not the kind of person I need to waste my energy on. Reporter: As for a "baywatch" star, so famous for her curves. Pamela. She doesn't when I worked with her. Reporter: And it comes back to the sexy swimsuits. And, yes, they got smaller over the years. How did you keep it on? We had plenty of moments where it didn't really stay on. It had a really low back. One little slip. And that shoulder came off, you know what happens when the shoulder comes off. It happened a lot. Reporter: When it comes to those weight clauses and contracts, hollywood insiders say, welcome to tinseltown. It's hardly any surprise in a show that featured people in their bathing suits, every episode, that people were required to keep in a certain weight and in a certain shape. Reporter: It turns out, life in that very tiny piece of red spandex wasn't always so rosie. The secrets, you can see more of the "baywatch" reunion tonight on "e.T."
This transcript has been automatically generated and may not be 100% accurate.