In her early teens , Cowper made an uncredited appearance in Alfred Hitchcock 's Frenzy ( 1972 ) .
In her early teens , Cowper played Rowan Morrison in the horror film The Wicker Man ( 1973 ) .
In her early teens , Cowper made an uncredited appearance in Alfred Hitchcock 's Frenzy ( 1972 ) and played Rowan Morrison in the horror film The Wicker Man ( 1973 ) .