McDonald's celebrates Grimace's return with new menu items and purple shake.

McDonald's is launching a "Grimace Birthday Meal and Shake" to celebrate the birthday of the fan-favorite character Grimace. The meal includes a choice of Big Mac or 10-piece Chicken McNuggets, medium French fries, and a purple shake inspired by Grimace's iconic color. The purple creature hails from "Grimace Island" and comes from a "huge family." The meal will be available at participating restaurants nationwide beginning June 12, while supplies last.