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What The Truck, a taco truck owned by Winchester bar owner Paul Lee, as seen in 2012. (File photo | MLive)

GRAND RAPIDS, MI -- Organizers are calling it the biggest gathering of food trucks this year in Grand Rapids.

The Roll'n Out Food Truck Fest, set for nearly all day Sunday, May 21, is the official launch of food truck season in the city.

More than 20 trucks -- some Grand Rapids staples, some newcomers and some out-of-town guests -- will be serving up street food from tacos to crepes to shave ice to barbecue.

The event runs from 11 a.m. to 7 p.m. Sunday at Heartside Park at 301 Ionia Ave. SW in downtown Grand Rapids.

Food trucks in Grand Rapids are operating under a new pilot program this year that expanded the areas where they can park in downtown and established a licensing program. All trucks must pass a health department inspection and a fire department inspection to operate.

In addition to their regular menus, the food trucks will be offering $3 tasting portions at the Sunday festival.

Three food-themed movies will be playing in the park as well:

- Noon: "Ratatouille" (G)

- 3 p.m.: "The Princess and the Frog" (G)

- 5 p.m.: "Chef" (R for language)

Live performances, artisans and games will also be a part of the day.

The event is organized by Downtown Grand Rapids Inc., Local First of West Michigan, Grand Rapids Food Truck Association, Community Media Center, Downtown Market and the city of Grand Rapids.