06/24/2008 at 07:00 AM EDT
's host is about to have a major makeover of her own.
Alison Sweeney is expecting her second child, PEOPLE has learned exclusively.
The 31-year-old blonde – also known for her long-running role on the soap Days of Our Lives
– made the "big reveal" Monday night in front of the Season 6 cast.
"She told them that, in a season all about family, hers is about to get bigger," says her rep, Carrie Simons.
The actress and her husband, Dave Sanov, have a 3-year-old son, Ben. Expecting and overjoyed, more stars share their happy baby news in PEOPLE