Angie Gruve cheers as she crosses the finish line at the Undy Run in downtown Arlington, TX on Nov. 12, 2016. The Undy Run raises money for colon cancer research. 

Angie Gruve cheers as she crosses the finish line at the Undy Run in downtown Arlington, TX on Nov. 12, 2016. The Undy Run raises money for colon cancer research. 

Alexandra Olivia/ Special Contributor

On a brisk Sunday morning in Arlington, it felt chilly for a pantsless jaunt in the D-FW 'burbs. So for anyone joining in on the Undy Run/Walk 5K in Arlington, leggings were in order.

But that didn't make the Undy Run any less fun.

The event on Nov. 12 benefitted the Colon Cancer Alliance. Undy Runs take place in 19 cities in the U.S. and are intended as lighthearted ways to raise money for colon cancer awareness, prevention and research. And yes, people really do run in their underwear!

Take a peek at the photos below. And say it with us: I see London, I see France, I see people in Arlington running in their underpants!

Colon cancer survivor Stafon Jackson cheers as she reaches the finish line at the Undy Run in Arlington.

Colon cancer survivor Stafon Jackson cheers as she reaches the finish line at the Undy Run in Arlington.

Colon cancer survivor Stafon Jackson hugs Ruby Whorton after a successful run at the Undy Run.

Colon cancer survivor Stafon Jackson hugs Ruby Whorton after a successful run at the Undy Run.

All photos by Alexandra Olivia/Special Contributor

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