Margot Kidder is an actress.
Margaret Ruth `` Margot '' Kidder ( born October 17 , 1948 ) is a Canadian American actress and activist . She rose to fame in 1978 for her role as Lois Lane in the Superman film series , opposite Christopher Reeve . She then appeared playing Siamese twins in Brian De Palma 's cult thriller Sisters ( 1973 ) ; in the slasher film Black Christmas ( 1974 ) ; and the drama The Great Waldo Pepper ( 1975 ) , opposite Robert Redford . Quackser Fortune Has a Cousin in the Bronx . It stars Gene Wilder as the titular Quackser Fortune , a poor Irish manure collector who falls in love with an American exchange student ( Margot Kidder ) after she almost runs him over .