Penny Cook (born 13 July 1957)   is a multi Logie Award -winning Australian actress and writer. She graduated from the National Institute of Dramatic Art (NIDA) in 1978, she has been active in television and film, best known of her soap opera roles as Vicky Dean Bowen in A Country Practice And Dr. Elly Fielding in E Street , as well as appearing in stage roles
Cook first appeared in the 1970s Australian television soap opera The Restless Years . Cook played veterinarian Vicky Dean Bowen in the drama series A Country Practice from 1981 to 1985 and the original Dr. Elly Fielding in the Ten Network soap E Street from 1989 to 1991, before being replaced in that role by actress Diane Craig.
In 1998 Cook had a daughter called Poppy. She was married to David Lynch and was previously married to broadcaster Clive Robertson.
Cook has had a long involvement in the theatre, both as an actress and director. She has been involved in nearly 40 stage productions.
In June 2007 she joined the cast of Australian soap opera Neighbours in the recurring role of Prue Brown, mother of Frazer Yeats (Ben Lawson) and Ringo Brown (Sam Clark).  Cook also guest starred in episodes of All Saints in 2007 and 2008.
In 2017 she played a supporting role in the hospital drama Pulse.