The actress posed for a provocative image to promote the new series, about a single mother working as a high-class prostitute, and several outlets have published an edited photo which shows Hewitt with a less-pronounced bust.
However, Hewitt, who wears a 36C bra size, is adamant she is not behind the altered picture.
She says, "Somebody sent me a copy of the photograph, and I was like, 'Um, what happened?'
"I'm not quite sure what's going on, but apparently somebody wanted me to have a boob reduction. The thing that's even crazier is that usually when they do that stuff, I had to see the photograph before they went out anywhere, and I never saw a new version of it."