updated 06/14/2011 AT 11:00 AM ET
•originally published 06/24/2011 AT 3:50 PM ET
Like many a bride-to-be, Sherri Shepherd is working hard to slim down for her upcoming wedding day.
But it’s more than a white dress that’s got her so motivated.
“I have to lose as much weight as possible for me to be healthy to carry [a baby],” Shepherd, who will wed Lamar Sally in August, tells PEOPLE of her plans to expand her family.