Grimace and Uncle O’Grimacey are welcoming the Shamrock Shake back to restaurants nationwide on Monday, Feb. 10 ...

McDonald's said Grimace rediscovered the original Shamrock Shake recipe, inspiring him to reconnect with Uncle O’Grimacey.

The Shamrock Shake is returning to McDonald's locations nationwide starting on this month, and with it is coming an old ...

McDonald’s is bringing back its beloved Shamrock Shake with the help of an old friend. The minty green milkshake will return ...

McDonald's is bringing Uncle O'Grimacey back to promote the Shamrock Shake. The chain has been reviving its McDonaldland ...

One of the most recognizable holiday treats at McDonald's is making its return, along with one of Grimace's relatives.

One of the most recognizable holiday treats at McDonald's is making its return, along with one of Grimace's relatives.

The Shamrock Shake’s return calls for a McDonald’s family reunion. The once-viral Grimace invited Uncle O’Grimacey over from Ireland to celebrate the minty treat’s comeback, which will ...

Your favorite purple blob is going green for St. Patrick's Day and for a limited time, Grimace is welcoming his uncle to celebrate St. Patrick's Day with the Shamrock Shake, which officially ...

Uncle O'Grimacey debuted in 1975, five years after the Shamrock Shake first hit the McDonald's menu. Shaped like Grimace, with a round body and short arms and legs, Uncle O'Grimacey is all green ...