An old-timey McDonald's character is making a comeback this month—and we have all the details below. Can you guess who it is?

The beloved Shamrock Shake is coming back to McDonald's, along with a McDonald's character no one's seen since the 1980's: ...

Uncle O’Grimacey, the Irish uncle of fuzzy purple fan favorite Grimace, is making his return to the Ronald McDonald universe.

Helping to welcome the Shamrock Shake back to menus are Grimace and his uncle, Uncle O’Grimacey. The reunion sheds light on ...

McDonald's is leaning on customers' nostalgia for its McDonaldland characters to spur sales of its Shamrock Shake. The ...

The company announced Tuesday that Uncle O'Grimacey - the green-hued uncle of fan-favorite character Grimace - would be making a 'special Shamrock visit.' A video posted on the company's social ...

To mark the fan-favorite menu item's seasonal return, McDonald's is also reuniting its lovable purple Grimace character with his older and green relative -- Uncle O'Grimacey. McDonald's also ...

Grimace’s Irish, green, Shamrock Shake-slinging uncle has returned to McDonald’s. Uncle O’Grimacey, who was introduced as a McDonaldland character in 1975 to promote the Shamrock Shake ...

Both Grimace and Uncle O’Grimacey are anthropomorphic characters but unlike his nephew, Uncle O’Grimacey is green in color and sports a top hat. A McDonald’s spokesperson told Fast Company t ...

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

(KTLA) — McDonald’s is bringing back another McDonaldland character to help kick off the return of Shamrock Shake season. The ...

(Grimace himself was originally an evil villain ... and dropped the McDonaldland campaign of commercials that included characters like Mayor McCheese, Officer Big Mac, the Hamburglar, Captain ...