
Hosts Kelly Ripa and Anderson Cooper arrive at the 2017 "CNN Heroes All-Star Tribute" at the American Museum of Natural History on Sunday, December 17, in New York City.

CNN "Young Wonder" Sidney Keys III created a book club for boys that focuses on African-American literature and culture.

2017 CNN Hero Jennifer Maddox is a Chicago police officer who founded an after-school program that helps at-risk kids.

"Stranger Things" star Gaten Matarazzo is among the celebrity presenters.

CNN anchor Don Lemon arrives at the 2017 CNN Heroes tribute.

2017 CNN Hero Khali Sweeney runs a boxing and tutoring program for kids in Detroit.

2017 CNN Hero Rosie Mashale founded a South African organization that helps more than 5,000 children, many of whom lost their parents to AIDS.

2017 CNN Hero Mona Patel created a support group for amputees like herself. The group provides peer support, education and financial help with prosthetics.

Actress Isabela Moner is among the celebrity presenters at the 2017 "CNN Heroes All-Star Tribute."

CNN anchor Brooke Baldwin on the CNN Heroes red carpet.

Comedian and actor Jim Gaffigan

2017 CNN Hero Samir Lakhani founded a nonprofit that recycles discarded hotel soap bars and distributes them to people in need.

2017 CNN Hero Aaron Valencia founded an after-school program that focuses on classic car restoration.

Grammy-nominated soul singer Andra Day will perform her hit song "Stand Up for Something" with Grammy-winning hip-hop artist Common.

2017 CNN Hero Andrew Manzi founded a nonprofit that provides free six-week-long surf camps and therapy sessions to fellow war veterans.

Oscar-nominated actress Alfre Woodard

CNN's senior media correspondent and "Reliable Sources" host Brian Stelter

2017 CNN Hero Leslie Morissette founded an organization that gives computers, iPads and robots to ill children so they can stay connected to friends.

2017 CNN Hero Amy Wright runs a popular coffee shop in North Carolina that employs dozens of people with disabilities.

HLN host and political commentator S. E. Cupp