It's a GIRL for Tiffany Amber Thiessen

It's a girl for Tiffany Amber Thiessen! The 36-year-old former Beverly Hills 90210 and Saved By the Bell actor gave birth to daughter "Harper" (8 pounds and 3 ounces) in Los Angeles Tuesday.

Thiessen's currently starring in the crime/comedy show White Collar.

Congrats to Tiffany, husband Brady Smith and family!