In today's episode of BBC Who Do You Think You Are? Dr Caroline Radcliffe will be telling the actor Sir Ian McKellen about his Victorian ancestor.
In the programme: "As the 'last of the McKellens', Sir Ian admits to a degree of melancholy as he delves into his family history. But the results pay off richly for one of Britain's greatest actors and civil rights champions. Ian's journey uncovers a theatrical ancestor, a Victorian political activist and a link to an ancient druidical landmark in the Lake District."