230Berkley022610_01_X17.jpgElizabeth Berkley is about to take on her greatest role yet -- parenthood!

The Saved by the Bell star and her gorgeous fashion designer hubby, Greg Lauren -- aka Ralph Lauren's nephew -- are "thrilled" to be expecting their first child, her rep confirmed to People on Monday.

Berkley, 39, is in her second trimester and is due this summer.

Congrats to the parents-to-be!