Zellweger had previously put on weight to play her role in "Bridget Jones's Diary" but found that this had affected her health, so she agreed to the use of prosthetics and a "fat suit" to play Pam.
Zellweger said "I learned it's a different kind of skill to work with your entire body covered in prosthetics." She wore cheek pieces that went all the way up to the temple, a chin piece, a nose piece, a neck piece that went all the way around, forearm and ankle pieces. These all had to be applied and removed daily.
In 2019, Keith Morrison of NBC's Dateline did a 10 episode podcast on Pam Hupp's involvement in the Betsy Faria murder. Renée Zellweger guests on the podcast.
Zellweger had to spend 80 minutes daily having the prosthetics applied that allowed her to play Pam. This had to be completed before she could go on to hair, makeup and wardrobe.
Betsy Faria's daughter is actively speaking against the making of this show.