Actor Ewan McGregor has been a UNICEF ambassador since 2004 and has filmed several documentaries with us including the recent BBC show Cold Chain Mission, about UNICEF's work on vaccinations for children.
This photo was taken in 2010, when Ewan visited Peru for Soccer Aid to find out about our work on child poverty and malnutrition.
© UNICEF/Caroline Irby/2010
Footballer David Beckham has worked with UNICEF since his days at Manchester United. In 2005 he became a Goodwill Ambassador with a special focus on our Sport for Development programme.
This photo shows David during his surprise visit in December 2011 to a UNICEF-supported children's shelter in Manila.
Children working and living on the streets, especially in large urban centres, are vulnerable to violence, drug abuse, criminal gangs, exploitation and traffic accidents. It's a tough environment to be a child, and many grow up far too fast.
© UNICEF/HQ08-0078/David Turnley
Sir Roger Moore was introduced to UNICEF by the late Audrey Hepburn. For over two decades Sir Roger and his wife, Lady Kristina Moore, have worked tirelessly to promote the welfare and rights of children worldwide.
This photo was taken in 2000 in Ghana, at a UNICEF-supported children's vaccine centre. Sir Roger is helping to administer a life-saving polio vaccine.
© UNICEF/Tom Craig/2000
Robbie Williams was introduced to UNICEF UK by the late, great Ian Dury. Robbie became a UNICEF UK Ambassador in 2001 and continues to be a passionate supporter of our work for children.
This picture was taken in 2012 in Mexico City, where Robbie met with slum children who receive support from UNICEF programs in the area.
Robbie and his best friend Jonathan Wilkes are also the brains behind the long-running Soccer Aid charity football games on ITV, which raise money for UNICEF's work around the world. The last Soccer Aid in 2012 raised an amazing £4.5 million for the world’s children.
© UNICEF UK/Andy Richter/2012
International TV Presenter Cat Deeley became a UNICEF UK Ambassador in 2010. Cat has done many trips with UNICEF UK and is a key supporter for our corporate partnerships.
In 2008 Cat travelled to the Philippines with UNICEF UK. In Manila, a city with over 50,000 children living on the streets, Cat took part in a UNICEF supported street education session, teaching street children basic education and skills.
© UNICEF UK/Sharron Lovell/2008
Campaigner and writer Jemima Khan became a UNICEF UK Ambassador in September 2001 and has been passionately campaigning for children and their rights ever since.
This photo was taken in 2006 when Jemima had a chance the witness firsthand how children and their families were affected by the earthquake that hit Pakistan in 2005, and to see what UNICEF's response was to the emergency.
© UNICEF UK/Abbi Traylor Smith/2006
Eddie Izzard visited Kenya with UNICEF in 2011 to film the ITV documentary Didn't We Fix Famine?
Here Eddie is visiting Hussein, a severely malnourished two-year-old, at the Ifo hospital in Dadaab, Kenya. Hussein received life-saving care from local UNICEF-supported health workers. With the right treatment and therapeutic feeding, malnourished children can recover in as little as six weeks.
© UNICEF/Siegfried Modola/2011
A former BBC war correspondent and MP, Martin Bell was appointed UNICEF Ambassador for Humanitarian Emergencies in 2001.
In this photo, taken in South Sudan in 2011, Martin sits with fellow UNICEF ambassador Mia Farrow. They're speaking to 18-year-old Flora, who returned to South Sudan on its independence from the north in July that year. Flora ran away from the south during the Sudanese civil war. Now she lives in a small home made from bits of wood with her husband, three sisters and their children.
UNICEF helped provide Flora with blankets and life-saving mosquito nets, to protect her and her family from deadly malaria.
© Veronique de Viguerie/Reportage by Getty Images for UNICEF
Producer, environmentalist, humanitarian and actress Trudie Styler is a long-standing supporter of UNICEF and has been a UNICEF UK Ambassador since 2004.
Trudie visited Pakistan with UNICEF UK in 2006 to witness recovery efforts a year after the country was hit by a devastating earthquake. Trudie had the chance to spend time with school children as a part of UNICEF’s welcome to school campaign in the earthquake zone.
© UNICEF UK/Abbi Traylor Smith/2006