Former "Real World" and "The Challenge" stars reunited in Washington D.C. on Tuesday to support the The Ovarian Cancer National Alliance and honor the late Diem Brown. Brown, who found fame on "The Real World/Road Rules Challenge," died last year after a long battle with ovarian and colon cancer. "Real World: Boston" alum-turned-Wisconsin Congressman Sean Duffy led the day’s event -- a caucus intended to raise awareness about the disease. He was joined by his wife and "Real World: San Francisco" star Rachel Campos-Duffy, along with her costar, David “Puck” Rainey, "Real World" original Norman Korpi, “Road Rules: X-Treme's" Derrick Kosinski and "Challenge: Free Agents" alum Laurel Stucky. Rachel posted a special photo of the group on Twitter, writing, "Bringing the @mtv real world crew for a great cause. @normankorpi @laurelstucky @mtvpuck #30daysofteal #COCCnow." The day's events were filmed for an upcoming MTV documentary.