Unicef UK ambassador Ewan McGregor has warned "famine is looming" in South Sudan in the charity's latest appeal to help at-risk children.
A video featuring a host of film stars and musicians has been released to highlight the plight of children caught up in the Syria conflict.
The Olympic gold medallist Mo Farah and Scottish actor Ewan McGregor received honours at Buckingham Palace from Prince Charles.
Actor Ewan McGregor has donned a kilt to pick up his OBE at Buckingham Palace today:
This morning I will be wearing my kilt for a special occasion. First time in a long time. #lovethekilt
Mo Farah and Ewan McGregor have arrived at Buckingham Palace for today's investiture ceremony.
Double Olympic-gold medallist Farah is to receive a CBE, while McGregor will be awarded an OBE.
Olympic gold medallist Mo Farah and actor Ewan McGregor have arrived at Buckingham Palace to receive their honours:
McGregor is to be awarded an OBE.
Actor Ewan McGregor will also collect the OBE for services to drama and charity today.
The 42-year-old Scot first found fame after playing heroin addict Mark Renton in director Danny Boyle's 1996 classic Trainspotting. He has since combined huge roles such as Obi-Wan Kenobi in Star Was with smaller independent movies. He also works with children charities Unicef and Go Campaign.
Olympic athlete Mo Farah will receive his CBE for services to athletics today. The double gold medallist, who grew up in west London, triumphed in both the 5,000m and 10,000m at last year's London Games.
With his trademark 'Mobot' celebration, the 30-year-old will pick his award up from Buckingham Palace after becoming one of the faces of Britain's golden summer of sport.
Hollywood star Ewan McGregor has appealed for emergency funding in war-torn Syria to save children's lives as the UK Government pledged an extra £50 million in aid.
McGregor, 41, star of Trainspotting and Moulin Rouge!, said: "After months of violence living in fear for their lives, the traumatised families were forced to flee for safety with nothing but their clothes they were wearing.
"But now these children face a new crisis.
"Heavy winter rain has flooded thousands of tents destroying the only place they can call home.
"Children have been facing freezing temperatures and fierce winds with no shelter or blankets.
"They are bitterly cold and frightened."
The Unicef ambassador, spoke out as the UK pledged an additional £50 million to deliver food, medical supplies and care, shelter, safe drinking water and sanitation services to hundreds of thousands of people across Syria and the region hit by their coldest temperatures in a decade.
Ewan McGregor and Naomi Watts have spoken about their new film The Impossible, based on the 2004 Boxing Day Tsunami.
Watch the full interview on the Daybreak website.
Emily Blunt has been promoting her latest film, Salmon Fishing in the Yemen, in which she co-stars with Ewan McGregor.
She came onto the Daybreak sofa to explain what the movie is about.