AceShowbiz -

"Clueless" is officially becoming a Broadway musical. In an interview with ET, director Amy Heckerling confirmed that she's moving forward with her plans to turn the 1995 popular comedy into a musical. "I've written what they call the book, and it's a jukebox musical," Heckerling told the site.

Heckerling said finding the perfect cast to replace Alicia Silverstone, Stacey Dash, Brittany Murphy and Paul Rudd for the stage version was a struggle. "Well casting - that's like going to be like the main problem," she shared.

"Everything goes so slowly. I go, wow, this takes a lot. I thought movies took a long time," Heckerling added of the casting process. "It's hard to know with Broadway when things will happen."

Kristin Hanggi ("Rock of Ages") will direct the musical with Dodger Theatrical producing.

Silverstone reflected on "Clueless" long-lasting cultural significance as the movie celebrated its 20th anniversary in July. "I mean, I think Amy Heckerling is so brilliant...She just touches on a time and a period," the 38-year-old told "Today" on Wednesday, June 24.

"And the amazing thing about this movie is that it's still being discovered. I love when older people, like grandparents, tell me that they love this movie. That's very odd and wonderful," she added, "And then little people who are just discovering it now - it's just being passed on. It's timeless. Even though it captured that time so well it seems that people really identify with it."