Mario Lopez and Courtney Mazza Are "Practicing" for Baby No. 2

Credit: Jean Baptiste Lacroix/WireImage

A.C. Slater, Jr.?

Mario Lopez's girlfriend Courtney Mazza gave birth to their daughter, Gia, in September 2010, but that doesn't mean the duo don't still have babies on the brain.

"Yeah, we're always thinking [about baby number two]," Lopez told Us Weekly at the Lexington Social House Grand Opening in Hollywood on Wednesday. "We're practicing, so we'll see!"

Slater and Mazza's nine-month-old daughter is already "about to walk" and "way ahead of her game," according to her mom.

"She is sassy!" Lopez, 37, added. "She is getting a lot sassier and is getting a lot more vocal."

So how did Mazza, a Broadway dancer, get back in shape post-baby? "I have a trainer that I workout with three days a week," she said. "Her name is Anna Maria Amore. She is locally at my gym near my house. She is fantastic… I was really lucky I think, being able to loose the weight easily. But I watch what I eat, I don’t deprive myself, but I eat healthy, I cook from [Mario's] book and I workout."