Mario Lopez and girlfriend Courtney Mazza -- who are expecting their first child in September -- strike a pose as they host an afternoon at the Liquid Pool Lounge at the Aria Resort and Casino Saturday in Nevada.

By peoplestaff225
Updated June 21, 2010 01:00 PM
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Soaking in the sun, Mario Lopez and girlfriend Courtney Mazza — who are expecting their first child in September — strike a pose as they host an afternoon at the Liquid Pool Lounge at the Aria Resort and Casino Saturday in Nevada.

What’s the best advice the dad-to-be, 36, has received so far?

“Get as much sleep as you can now,” the author and TV host tells PEOPLE Moms & Babies.

“I’ve heard you just kind of know what to do after a while and instincts kick in after that. You have to be patient, and I’m pretty good at that.”

— Reporting by Mark Gray