40 Pictures of Charitable Celebrities Giving Back

Christina served food to children in Ecuador while on a humanitarian trip with the United Nations World Food Programme in September 2015.

In September 2015, Orlando paid a visit to Syrian refugees during a UNICEF trip.

David Beckham played soccer with schoolchildren during a February 2013 visit on behalf of UNICEF to meet with survivors from the 2013 typhoon that devastated the region.

Anne Hathaway served food to children at the Kids Cafe in New York's Harlem neighborhood during the holidays in December 2008.

Andrew helped plants trees with kids for the WWF and Earth Hour in Singapore in March 2014.

In May 2013, Emma Stone and Olivia Wilde paired up to host the Revlon Run Walk For Women in NYC.

Angelina visited a Syrian refugee camp in Zahle, Lebanon, in February 2014. She traveled on behalf of the United Nations and met with refugees who had been displaced due to the Syrian civil war.

In March 2010, Sienna Miller took a philanthropic trip to Haiti as an ambassador for International Medical Corps.

Gabrielle Union auctioned off a pair of sneakers to raise money for the cause at the June Susan G. Komen Global Race For the Cure in Washington DC.

Gisele Bündchen planted seeds with 80 kids in São Paolo, Brazil, in September 2011.

Chef Ming Tsai and actor Matt Damon joked together during the Family Reach Foundation's Cooking Live event in September 2012.

In August 2010, Sandra Bullock cut the ceremonial ribbon at New Orleans's Warren Easton Charter High School at the campus health clinic she helped fund.

In October 2011, the supermodel visited an orphanage in Moscow as part of her commitment to Northern Crown Children's Charity.

Nicole Richie helped restore the CITYarts Mosaic Peace Wall in NYC at an event for DoSomething.org in July 2012.

Ben Affleck gambled for a good cause at an LA charity event in May 2011.

Beyoncé surprised students at a public school in New York's Harlem neighborhood as part of Michelle Obama's Let's Move campaign in May 2011.

Then-couple Britney and Justin participated in *NSYNC's Challenge For the Children basketball game in Las Vegas back in July 2001.

In May 2013, Kerry Washington performed with students during an event while visiting the Savoy School with First Lady Michelle Obama in Washington DC.

The Duchess of Cambridge spent time in the great outdoors with children at an Expanding Horizons Primary School camp in Kent, England, in June 2012.

Miranda Kerr popped up in her native Sydney, Australia, to promote the Kids Helpline in February 2013.

Reese and Jennifer teamed up for the Stand Up to Cancer fundraising event in September 2014.

Jennifer Garner gardened for a good cause with kids in support of Save the Children in June 2011.

Halle Berry hosted the Revlon Run/Walk For Woman in LA in May 2013 — the actress has supported the charity effort as a brand ambassador since 1996.

Prince Harry danced with schoolchildren during his February 2013 visit to the Kananelo Centre For the Deaf in Lesotho.

Usher posed with staff and children at the Be the Change event in Washington DC back in January 2009.

As part of her Operation Smile initiative in May 2010, Jessica Simpson posed with a young patient named Meena at the group's annual gala.

Leonardo DiCaprio joined the People's Climate March in NYC in September 2014.

Jennifer Love Hewitt served Thanksgiving dinner at the LA Mission in November 2011.

In October 2010, Matthew McConaughey hit the pavement with dozens of runners in LA taking part in his own charity event with J.K. Livin, which encourages youth to lead active lifestyles.

Robert Pattinson joked around with kids during his visit to Children's Hospital Los Angeles in August 2013.

Avon spokesperson Zoe Saldana visited the Red Cross in the Dominican Republic in February 2010.

The Kardashian sisters teamed up with Babies"R"Us to surprise military moms-to-be with gifts — including items from their Kardashian Kids collection — at a New Jersey event in July 2014.

Cameron got down and dirty with volunteers while building a fence in Boston in September 2009.

NBA star Dwyane Wade hosted a holiday event for kids in Miami as part of his Wade's World Foundation in December 2011.

Taylor met up with young ambassadors from Save the Children for a Christmas event in London in November 2012.

Tom Brady hosted a football challenge for Best Buddies International in Boston back in June 2012.

In November 2013, Prince William participated in St Basil's youth homeless charity project in Birmingham, London.

Kristen Stewart paired up with Sugar Ray Leonard for the Juvenile Diabetes Research Foundation's annual Walk to Cure Diabetes in LA back in November 2009.

Neil Patrick Harris helped prepare food for the homeless at the LA Mission on Thanksgiving Day in 2013.

In October 2006, Kate Bosworth posed with Lucille Saraco to help punch a way to the cure with a $5.6 million check for the fight against breast cancer in NYC.