Ron Howard, Henry Winkler

The cast of TV classic HAPPY DAYS up in arms – that is everyone except RON HOWARD and HENRY WINKLER! Learn WHY!

CBS got served with in Los Angeles Superior Court yesterday by the "Happy Days" cast Tuesday, alleging they're not their share of profits from DVD sales, lunch boxes, board games, Vegas slot machines  and other merchandising derived from the 1970s sitcom.

In a clas action suit, the plaintiffs include cast members Anson Williams, Marion Ross, Don Most, Erin Moran and Patricia Bosley, the widow of  Tom Bosley, who died last year.

The two principal members of the 1974 to 1984 show, Henry Winkler (The Fonz) and Ron Howard (Rixchie Cunningham), are not involved with the lawsuit.

Paramount which produced the show originally is now part of the CBS Corporation.

The suit charges that the cast was guaranteed 5 percent of 100 percent net profit from merchandise using their names or likenesses.

According to the legal docs, Erin Moran was told no money was due her and that CBS had not shown any revenue reports.

"Despite this ongoing obligation, defendants adopted a 'don't ask, don't pay' policy," the suit said. "If you don't ask, then we don't pay."

CBS said it intends to honor its contractual obligations to the cast.