Actress Eva Longoria and her athlete hubby, Tony Parker, are "practicing" like mad to in a bid to leap on board the packed-to-capacity celebrity baby bandwagon.

And when they book their seats, they'll be "singing it from the rooftops," she insists. "We've got big families. I can't wait and we're practicing a lot. But I'm not pregnant," says the Desperate Housewives star. 

Not yet, at least….stay tuned!