Reese Witherspoon and Fox 2000 are mounting an untitled biopic of singer Peggy Lee starring Witherspoon. Lee rose to prominence during the big band era and had her first hit, "Somebody Else is Taking My Place," in 1941. She recorded a series of hit albums and songs, including "Fever" and "Is That All There Is?" during the next 30 years. She's regarded as one of the most influential jazz vocalists of all time. Lee also was a prolific songwriter. She penned a number of songs and voiced several characters in Disney's 1955 animated hit "Lady in the Tramp." In the early 1990s, Lee won a landmark case against the Mouse House for royalties from homevid sales of the pic. Her career extended to television and the bigscreen, where her credits included the 1952 redo of "The Jazz Singer" and "Pete Kelly's Blues."