It is a wonderfully wacko work, sparked with Cook's oomph, Dunaway's cackle and the superstar power of the sensational Slater. What a face! As long as people prevail over effects, Supergirl glitters, she glows. [23 Nov 1984, p.27]

Director Jeannot Szwarc could have done more with the action scenes, but he has a snappy sense of pace and comic timing. Blond, blue-eyed Slater brings an engaging sweetness to Supergirl; and she plays Linda with an awkward, gawky girlishness, subtly different from her Supergirl role.

Helen Slater is a find: blonde as Supergirl, dark-haired as Linda Lee, she’s an appealing young heroine in either guise. Screenplay is filled with witty lines and enjoyable characters, but Jeannot Szwarc’s direction is rather flat.

Most delightful of the Super-series for its good-natured disregard of narrative considerations.

The gift of Christopher Reeve, in his best scenes and when the filmmakers allow it, is to play Superman without laughing, to take him seriously so that we can have some innocent escapist fun. Helen Slater has the same gift, but is given even less chance to exercise it in Supergirl, and the result is an unhappy, unfunny, unexciting movie.