"It wasn't a complete surprise," the 18-year-old told PEOPLE at the Rémy Martin Spirit Unleashed launch party in Hollywood Thursday night. "It's never easy to end. [But] there's no bitterness – we're all a family."
Williams's second wife, Marsha, filed for divorce last month, citing irreconcilable differences. In addition to Zelda, they also have a 16-year-old son, Cody. Williams also has a son, Zachary, 25, from his previous marriage.
"I just want my parents to be happy," said Zelda, who stars in the upcoming horror flick Don't Look Up. "And they did last 18 years – a lot longer than most!"(She added that the family knew the divorce was coming for "for months," and that her parents gave them advance warning before officially filing.)
Family TiesAlthough Zelda admits she wasn't particularly close with her dad growing up, the two have been spending more time together recently.
"He wasn't around a lot when I was a kid but I have the wonderful opportunity to get to know him now," she explained. "He's taking more of a break. He's not doing four films a year; he's doing one or two .... Now he has more time for us."
She also said that her dad is doing well after his alcohol relapse in 2006. "He's great," said Zelda. "He's on the wagon."
Watching her father's stuggles with alcoholism has already taught the aspiring actress all about the pitfalls of the Hollywood party scene. "I took a vow of sobriety when my dad relapsed, so I don't drink," she said. "And I have great friends."