Claire Patricia Grogan, known professionally as Clare Grogan or sometimes as C. P. Grogan, is a Scottish singer, actress, and author. She is best known as the lead vocalist of the 1980s new wave and post-punk band Altered Images, as well as for supporting roles in the coming-of-age romantic comedy film Gregory's Girl (1981), and the science fiction comedy programme Red Dwarf (1988–1993) as the first incarnation of Kristine Kochanski.