Harry Potter author JK Rowling has said it is "painful" to know that her mother never knew about her writing success.
Rowling said she was beset with "guilt and worry and anxiety" when her mother Anne was diagnosed with multiple sclerosis, a disease which led to her death in 1990.
Speaking on Radio 4's Woman's House, she said she regretted her mother not being around to see the books become bestsellers.
"She never knew about Harry Potter - I started writing it six months before she died, so that is painful. I wish she'd known."