Tiffani Thiessen Welcomes a Baby Girl, Harper Renn

 Duffy-Marie Arnoult/WireImage.com

It's a girl for Tiffani Thiessen!

The White Collar star, 36, and her husband, artist and actor Brady Smith, welcomed a baby girl, Harper Renn Smith, Tuesday in L.A., her rep confirms to UsMagazine.com.

"They are all doing great," the rep tells Us of the family.

Over the weekend, her Saved By the Bell co-star Mark-Paul Gosselaar, 36, told Us Thiessen — who was due in May — was "ready to pop."

"It's not a fun stage for the women or the men involved, but definitely not for the women, so I wish her nothing but the best," added Gosselaar, who is dad to Michael, 6, and Ava, 4, with Lisa Ann Russell, whom he separated from earlier this month.

Thiessen has said she was going to "give a Girl Scout effort to hypnobirthing," which means she'd use self-hypnosis to stay calm while delivering.

PHOTOS: My baby looks like a celebrity!

"I'm really excited about it," she told Pregnancy magazine. "That's my plan, but my husband and I are both very, very open to however the child is supposed to come out. Knock on wood it all goes well. I'm not one to judge any woman on how they choose to give birth. It's individual and I think everyone's different."

The actress has said she's not stressing too much about being a first-time mom.

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