The Biggest Loser host broke the news to her coworkers Monday

By People Staff
Updated June 24, 2008 08:00 AM
Phil McCarten/Reuters/Landov

Biggest Loser‘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