Left: Red, green, blue color image of the NGC 3447 field, generated from HST WFC3/UVIS imaging (F814W + F814W/F555W + F555W). The tidal companion (NGC 3447A; left) and the main body (NGC 3447; right) regions used in this Letter are delineated using dashed ellipses (the region to the lower left of the yellow dashed line in the dwarf region was further excluded to remove a separate dwarf in projection). Right: zoomed-in views that show color JWST/NIRCam (F277W/F150W/F090W) imaging from a region within the dwarf (top) and the main body (bottom). These two cutouts are shown with identical stretch and contrast (drawn from the same parent image) to highlight the lack of crowded stellar background in the dwarf region. Cepheids are identified using yellow circles.