Tiffani Thiessen

Saved By the Bell and Beverly Hills, 90210 star Tiffani Thiessen is expecting her first child next May with actor-husband Brady Smith.

Check out photos of Thiessen

"We are over the moon!" the couple said in a statement to People. "It's something we've wanted for a long time and we are thrilled that it's actually happening."

Thiessen, 35, and the 37-year-old Smith, who has guest-starred on various network series, have been married since 2005.

The mom-to-be recently began a new role on the new USA drama White Collar.