This three-colour XMM-Newton image of NGC 4631 was created from merged EPIC pn and MOS images. Red, green and blue represent emission in the (0.2-1.0) keV, (1.0-2.0) keV, and (2.0-4.5) keV energy bands, respectively. The ellipse indicates the outer border of the H-alpha emitting disc. An extended soft X-ray halo is clearly visible which is most likely triggered by star formation related processes in the disc plane.