When it comes to animal activism, Paul McCartney has little love for McDonald's and its fast-food, meat-fueled empire.

The former Beatle became incensed when PETA revealed that a Liverpool McDonald's was using his picture on their walls — and demanded the images be taken down. McCartney is a long-time vegetarian and recently started a worldwide Meatless Mondays campaign.

"Paul's famous (for) saying, 'If slaughterhouses had glass walls, everyone would be vegetarian,' " PETA President Ingrid Newkirk said to TODAYshow.com in an e-mail. "PETA alerted Paul to the photos of himself in the McDonald's restaurant, and he objected to the photos being put up in a place that sells the remains of slaughtered animals between two halves of a bun."

According to managers at the restaurant, the photographs were posted to "acknowledge the outstanding contribution the Beatles made to both local and global culture."

After 18-months of protest, however, McCartney finally won the war. Last week, managers at the restaurant took down the offending photos.

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Paul McCartney wins beef with McDonald's
Former Beatle and famous vegetarian demands that Liverpool restaurant remove photos of him from its walls.