A seasonal favorite will be back on the menu next week. Here's what we know about McDonald's Shamrock Shake and Oreo Shamrock McFlurry.

McDonald’s is bringing back Uncle O’Grimacey, the long-lost green mascot who originally promoted the Shamrock Shake in the 1970s. First introduced as Grimace’s Irish uncle, he disappeared from McDonald’s marketing but is now making a comeback to celebrate the Shamrock Shake’s return on February 10,

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