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

McDonald's brings back Uncle O'Grimacey, the beloved green mascot, to celebrate the return of the Shamrock Shake.

Despite his hiatus, the green, furry icon was never forgotten. Uncle O’Grimacey earned his own merch line, called the Uncle O ...

McDonalds is bringing back two iconic favorites to celebrate the 50th anniversary of its Ronald McDonald House charity.

McDonald’s is bringing back its popular Shamrock Shake yet again, this time accompanied by the fast-food chain’s Uncle ...

Your favorite purple blob is going green for St. Patrick's Day and for a limited time, Grimace is welcoming his uncle to ...

In social media videos, purple mascot Grimace visits Ancestry.com and discovers a connection to his Irish uncle.

Uncle O'Grimacey, Grimace’s Irish green uncle, is back at McDonald’s after 40 years to promote the return of the Shamrock ...

He hasn't gone away, you know - after becoming an Internet legend, Uncle O'Grimacey is returning for McDonald's Shamrock ...

The fast-food giant is bringing back the Shamrock Shake and is using a character it hasn’t employed in 40 years as it works ...

However, some McDonald's locations may have Shamrock Shakes as early as today, Feb. 4. Will Shamrock Shakes be at McDonald's ...

One of Grimace's relatives is visiting from Ireland as one of the most recognizable holiday treats at McDonald's is making its return.