biographical article needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately, especially if potentially libelous or harmful. (May 2010) Geraldine Somerville Born Geraldine Margaret Agnew-Somerville 19 May 1967 (1967-05-19) (age 43) County Meath, Republic of Ireland Spouse William Osbourne-Young Geraldine Margaret Agnew-Somerville (born 19 May 1967) is an Irish-born British actress best known for her role as Penhaligon in Cracker and as Harry's mother, Lily Potter, in the Harry Potter film series..