Reaper star Bret Harrison has joined the cast of Fox comedy pilot The Perfect Stanleys (formerly untitled Dana Klein), from 20th Century Fox TV and Kapital Entertainment. In a recasting, Harrison will play Jack Stanley, taking over for Brian Austin Green who originally was cast in the role but had to pull out for medical reasons.

“Brian Austin Green had to withdraw from the project due to a viral infection from which he is expected to make a full recovery,” 20th TV said in a statement.

Written/exec produced by Klein and directed by Pam Fryman, The Perfect Stanleys is told from the point of view of Ellen (Jenna Elfman), a working mom who is in constant competition with her perfect, stay-at-home sister-in-law Amy (Liza Lapira). Amy’s husband Jack Stanley is described as an undisciplined, laid back, rule breaker who pretty much does whatever he wants and doesn’t worry about the consequences (except when it comes to his wife, Amy, who terrifies him).

Harrison, who will next be seen in ABC’s Astronaut Wives Club, is repped by UTA.