Victoria Beckham
The fashion designer, wife of David Beckham, mother of four and Spice Girls singer was made a U.N. Goodwill Ambassador in Septmber 2014 and will work with the group's Joint Programme on HIV/AIDS. She said at a press conference at the United Nations that month that she hopes to empower women and help raise awareness about the fight against HIV/AIDS. She said she was inspired to take action following a "life-changing" trip to South Africa. She made her remarks the same day as the launch of her new London store, for which she was not present.
Emma Watson
The Harry Potter actress was made a U.N. Women Goodwill Ambassador in early 2014 and gave a powerful speech about gender inequality and feminism at the United Nations in September.
Selena Gomez
The "Come and Get It" singer visits children at Satbariya Rapti Secondary School during her UNICEF trip to Nepal.
Orlando Bloom
The Brit has supported UNICEF's efforts since 2007, and the U.N. recognized his advocacy by naming him a UNICEF Goodwill Ambassador in 2009.
Angelina Jolie
In this photo, the U.N. Refugee Agency Goodwill Ambassador attends a meeting in Geneva, Switzerland, where the actress said further help was needed in Somalia and its surrounding countries. She described the situation as "the humanitarian crisis of a generation."
David Beckham
This sexy soccer star has been an UNICEF supporter since his Manchester United days! In 2005, he became a Goodwill Ambassador with a special focus in the Sport for Development program.
Drew Barrymore
Barrymore was appointed a World Food Programme's (WFP) Ambassador Against Hunger in 2007 after traveling to Kenya to meet children going to school there.
Ricky Martin
The Latin singer first became associated with UNICEF back in 1984, but wasn't officially appointed an ambassador until 2003.
Christina Aguilera
As a WFP Ambassador Against Hunger, the singer visits schools in Haiti to meet children receiving food aid.
Nicolas Cage
Cage is an U.N. Ambassador on Drugs and Crime and urges action against organized crime. He has said that organized crime is a "deadly infection that preys on human beings."
Vanessa Redgrave
As a UNICEF ambassador, Vanessa Redgrave speaks at an U.N. human rights event, where she calls for more humanitarian aid to the Palestinians.
Serena Williams
As an UNICEF ambassador, the tennis star's focus is on providing every child with a quality education, particularly in Africa.
Antonio Banderas
Spanish actor Antonio Banderas became an ambassador for the U.N. Development Programme (UNDP) in 2010. Former Chilean president Michelle Bachelet was at one of the events he attended about having extreme poverty eliminated by 2015.
Nicole Kidman
The U.N. Women Goodwill Ambassador works toward raising awareness on the infringement of women's rights and violence against women around the world.
Naomi Watts
As an ambassador for the UN Programmes on HIV/AIDs, the actress is an strong advocate for an HIV-free generation and is working toward ensuring there are no new HIV infections among kids by 2015.
Whoopi Goldberg
The View host is an outspoken human rights activist and a UNICEF ambassador who advocates for children, human rights, education, substance abuse and the fight against HIV/AIDS.
Maria Sharapova
The tennis star and UNDP ambassador has traveled to Belarus to visit children living in areas affected by the 1986 Chernobyl nuclear disaster.
Liam Neeson
Neeson was appointed a UNICEF ambassador in 2011, and his efforts are geared toward helping children overcome poverty, violence, disease and discrimination.
Gisele Bündchen
The U.N. Environment Programme ambassador has said, "The environment has always been my passion. Mother Earth is our fundamental life-support system, and by becoming aware and responsible now, we can assist in preserving the planet."
Jackie Chan
The Rush Hour star and karate expert is also a UNICEF ambassador, and encourages people to only use martial arts "as a peaceful force and never to threaten or harm others."
Susan Sarandon
The actress is a Goodwill Ambassador for the Food and Agricultural Organization (FAO) and the United Nations Children's Fund (UNICEF).
Céline Dion
The Canadian superstar joined the Goodwill Ambassadors in 2010 as an ambassador against world hunger.