The House in the Square (also titled I'll Never Forget You in the United States and Man of Two Worlds) is a 1951 science fiction fantasy film starring Tyrone Power and Ann Blyth. It was an early film for director Roy Ward Baker.

Power plays Peter Standish, an American atomic scientist who is transported to the 18th century, where he falls in love. It was adapted from the 1926 play Berkeley Square by John L. Balderston, which was also the basis of the 1933 film Berkeley Square. Irene Browne reprised her role as Lady Anne Pettigrew from the 1933 version.

It used a similar technique to the 1939 film The Wizard of Oz, presenting the reality of the opening and closing sequences in black-and-white, and the fantasy sequence of the film in Technicolor.