You can thank Ellen DeGenerers for making the selfie a big "thing."
Now it's time to incorporate it into the Shamrock Shuffle.
Runners, share you #ShamrockSelfie with NBC 5, and we'll add it to our gallery of photos.
Whether you're warming up, or even during the race, there's plenty of opportunities to snap a quick selfie. Just remember to email the photo to firstname.lastname@example.org, or tag your masterpiece #ShamrockSelfie or #chicagogram on Instagram.
And don't forget, all the cool kids are doing it!