Phyllis Amanda Peterson (July 8, 1971 – July 3, 2015) was an American actress best known for her roles as Cindy Mancini in the 1987 film Can't Buy Me Love and Sunny Sisk on the NBC drama series A Year in the Life (1987–1988). Peterson died at age 43 from an accidental drug overdose when she mixed a prescription drug with illegally obtained morphine following surgery.