DWTS troupe member Jenna Johnson has been standing in for Zee during camera blocking in preparation for the upcoming show, while the 35-year-old new mom tries to rest and recuperate.
Zee, who has been one of the season's frontrunners since the premiere, is currently seeing the show's physical therapist, according to the source. She's taking it easy in the hopes that she will be able to participate, however she won't know for sure until the show kicks off tomorrow night.
Zee had been rehearsing earlier this week with her partner Val Chmerkovskiy, but was forced to stop due to the back pain.
"My pelvis is very loose and unstable...because I just had a baby," she told ABC News on Sunday. Zee, who gave birth to her first child, son Adrian, in December, revealed that her physical therapist said her pelvis was "just moving all over" and was nearly "an in off" from where it's supposed to be.