Giacomo Rossi Stuart (25 August 1925 – 20 October 1994) was an Italian film actor often credited as Jack Stuart or Giacomo Rossi-Stuart.

[1] including the Gamma One science fiction film series.

Born in Todi to an Italian father and a Scottish mother, Stuart was a highly successful athlete when young; he competed in the pentathlon.

After getting interested in acting, he studied at Actors Studio in New York City.

[2] His children also went into acting: son Kim Rossi Stuart and daughter Valentina Rossi Stuart, who also is a stuntwoman.