The two filed a federal class-action lawsuit Friday against the celebrity hangout Sofrito on East 57th Street in Manhattan.
Beltran invested last year in the restaurant, which serves Puerto Rican-style food.
A waiter and bartender say Sofrito's owners did not pay them overtime and their tips were distributed among workers who hadn't earned them.
Tip sharing is common in city restaurants, but it's against the law. Recently, many popular eateries have faced similar lawsuits alleging wage violations.
The plaintiffs are seeking unspecified damages for themselves and more than 50 other workers.
A call for comment to Sofrito was not immediately returned.