Bella Ramsey: Bella Ramsey. Actress: Game of Thrones. Bella Ramsey made their professional acting debut as fierce young noblewoman Lyanna Mormont in Season 6 of HBO's Game of Thrones, a role that quickly became a fan favorite and saw Bella return for the next 2 seasons. Bella will be returning to HBO as the leading role of 'Ellie Williams' in their new flagship show The Last of Us opposite Pedro Pascal. Bella...