Dec. 26, 2012 at 4:50 PM ET
Simpson "will not be following the program during the pregnancy while her weight and well-being are monitored by her obstetrician, as is recommended for any woman during pregnancy," Weight Watchers said in a statement.
Simpson also confirms her second pregnancy in a new commercial for Weight Watchers, in which she says, "This year is all about new beginnings for me. I lost over 50 pounds on Weight Watchers and did not have to be perfect to do it. Being healthy has become a part of who I am, which is great timing because I'm having another baby."