Holly Marie Combs Ryan (born December 3, 1973) is an American actress and producer. She is known for her roles as Kimberly Brock in the CBS series Picket Fences (1992–1996), Piper Halliwell in The WB series Charmed (1998–2006) and Ella Montgomery in the Freeform series Pretty Little Liars (2010–2017).
Source : Wikipedia
