Lisa Rinna is a cast member of the reality TV show Real Housewives of Beverly Hills. She is considered irreplaceable because of her unique personality and presence on the show.
According to executive producer Alex Baskin, there are currently no plans to directly replace Lisa Rinna on the show. They believe that she is a one-of-a-kind cast member.
The producers are looking for someone who can both fit in with the existing cast and stand out on their own. They want someone who has relationships with the other cast members and can make a distinct impression.