He 's not known for his friendships with the Royal Family but actor Martin Sheen looked remarkably at ease as he posed with Princess Beatrice at a London event last night . Joining Mr Sheen and the Princess was Holly Branson , who was enjoying her first solo night out since becoming the mother of twins Etta and Artie in December . The unlikely trio were at the Bulgari Hotel in central London for a gala dinner held in support of We Day , which is part of a charity movement that aims to give young people more understanding of global events . Scroll down for video . Unlikely combination : Martin Sheen ( centre ) with Princess Beatrice ( right ) and Holly Branson ( left ) Ms Branson will co-chair a day of festivities on Friday and last night gave a speech to an audience that included her father Sir Richard Branson and her brother Sam . Sam is himself a new father with wife Isabella Antruther-Gough-Calthorpe giving birth to the couple 's first child , a daughter Eva-Deia , late last month . Like the Branson clan , Princess Beatrice , who recently embarked on a finance course in the US , is a supporter of We Day , as is her cousin Prince Harry . Ahead of the event , she took to Twitter to declare her support , writing : 'Proud to be supporting @ weday this Friday @ HollyBranson is making the opening speech , good luck you ’ ll do great . ' Supper : The trio were all attending a gala dinner at the Bulgari Hotel in central London . Smile ! Mr Sheen poses with the pair and , right , they strike an almost identical one with Sam Branson . Family affair : Next , Sir Richard Branson gets in on the act and joins his children and Mr Sheen . Ever expanding : Brothers Marc and Craig Kielburger join Mr Sheen and the Branson family for another . Beatrice , 26 , has long been close to Holly , 33 , with the pair regularly holidaying together as well as taking part in joint charitable ventures . Although the trio have not been photographed together before , Mr Sheen is , it seems , their newest recruit , with the 74-year-old actor set to speak at Friday 's event at Wembley alongside all three Bransons . Last year 's event , which also featured actor Clive Owen , saw Prince Harry take to the stage at Wembley Arena , where he called on young people to get involved with charity work . 'Some people don ’ t think it ’ s cool to help others…personally , I think it ’ s the coolest thing in the world , ' he enthused . While this year 's event may not have a royal speaker , it certainly made up for it with the launch dinner at the Bulgari Hotel where guests were served seared beef fillet and gianduja [ a type of hazelnut infused Italian chocolate ] mousse ahead of speeches at the end of the night . One-on-one : Mr Sheen with Sir Richard Branson ( left ) and Princess Beatrice with Spencer West ( right ) Family night out : Sir Richard Branson with daughter Holly , 33 , and son Sam , 30 . Canapés . Crab , cucumber and avocado roll . Marinated feta , grilled aubergine , dry tomato . Tuna-sesame-mango . Beef pastrami and horseradish . Starter . Riviera-style seasonal vegetables , fresh herb salad . Main course . Seared beef fillet , black pepper , confit potato , red wine sauce or Pumpkin ravioli , chestnut & rocket . Pudding . Gianduja mousse and hazelnut caramel . Tea , coffee and Biscotti .
Martin Sheen , 74 , joined Princess Holly Branson at the Bulgari Hotel in London . Also there was Beatrice , 33 , Sam Branson , 30 , and Sir Richard , 64 . The unlikely group were at an event to mark the launch of We Day 2015 . Charity movement aims to increase youth engagement with world events . Along with Princess Holly Branson , Prince Harry is a supporter of the intiative .