Kimberly Jo Zimmer is an American actress, best known for her role as Reva Shayne on the CBS soap opera Guiding Light. For this portrayal, she has won four Daytime Emmy Awards for Outstanding Lead Actress in a Drama Series.

Guiding Light is an American radio and television soap opera. Guiding Light aired on CBS for 57 years between June 30, 1952, and September 18, 2009, overlapping a 19-year broadcast on radio between January 25, 1937, and June 29, 1956. With 72 years of radio and television runs, Guiding Light is the longest-running soap opera, ahead of General Hospital, and is the fifth-longest-running program in all of broadcast history; only the American country music radio program Grand Ole Opry, the BBC religious program The Daily Service (1928), the CBS religious program Music and the Spoken Word (1929), and the Norwegian children's radio program Lørdagsbarnetimen (1924–2010) have been on the air longer.