Bear Grylls' son Marmaduke towers over him in a gallery of pictures to mark his 19th - as he spends his first birthday away from family while travelling Asia
Bear Grylls reveals his pride as son Marmaduke, 18, heads off on a four-month trip round Asia after 'working hard' in order to pay for it himself
Bear Grylls is dwarfed by son Marmaduke, 18, in unearthed picture... after Gary Barlow's son Daniel, 24, went viral for his impressive height
Bear Grylls is dwarfed by son Marmaduke in rare family snap with wife Shara as they celebrate his 18th birthday
