The drama stars Leslie Bibb as Amanda, a recently-divorced single mother who returns to the neighbourhood where she grew up.
Scott has now signed up for a recurring role, Deadline reports.
He will play a man who went to high school with Amanda and her classmates but was considered a nerd. However, he is now a multi-millionaire.
Scott starred as Russell in Southland and has appeared in shows such as Law & Order, ER and Sons of Anarchy. He recently worked on the ABC comedy pilot Bad Mom but the project was not picked up.
Good Christian Belles also stars David James Elliott and Kristin Chenoweth, who recently admitted that she does not think it is like anything else on television.
The show is due to premiere on ABC in midseason.
Watch a trailer for Good Christian Belles below: