Workers at a Pennsylvania Whole Foods store voted on Monday to unionize, forming the first union in the organic grocery chain owned by Amazon.

Whole Foods workers at the Spring Garden store have expressed frustration about low pay and want better health-care benefits.

The grocery chain’s store in Philadelphia becomes the first to join a union, where workers hope to expand organizing to other outlets and across the Amazon empire.

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Workers voted 130-100 for union representation at the Center City in Philadelphia, according to the National Labor Relations Board.

Workers at a Whole Foods Market in Pennsylvania have voted to unionize, becoming the first group of employees to pull off a labor win at the Amazon-owned grocery store chain.

The Amazon-owned grocery store brand says it's 'disappointed' in the employees' plan to join the United Food and Commercial Workers union.

The vote marks the first successful organizing effort at Whole Foods since Amazon acquired the grocer for $13.7 billion in 2017.

The union's election win, which workers called "historic," tees up another organizing battle inside Amazon's workforce.

A majority of workers at a Whole Foods Market store in Philadelphia voted to join the United Food and Commercial Workers International union, giving organized labor a new foothold at parent company Amazon.

Workers voted for a union—the first at the Amazon-owned grocery store. But actually negotiating a contract will be a long battle, especially now that Trump has gutted the National Labor Relations Board.