Chace Crawford in 'What to Expect': Find Out the "Gross" Thing He Learned!

Starring in What to Expect When You're Expecting didn't get Chace Crawford or Brooklyn Decker ready to expect...just yet.

We caught up with the cast of the first movie based on a pregnancy manual at the film's NYC premiere.

Brooklyn plays a young woman whose pregnancy is so maddeningly perfect she's still wearing six-inch heels at seven months! We had to ask if prepping for the role got her thinking about having kids with her husband Andy Roddick, but she was quick to put the brakes on that notion:

"It was really fun to play a pregnant woman," says Brooklyn. "But it was even more fun to take the belly off at the end of the day."

Chace also admitted he's not ready to be a dad (hit the clip above to find out which delivery detail kind of grossed him out).

"I might start off with a goldfish, or a chameleon. I envision [parenthood] for myself one day when I grow up, when I'm an adult," says Chace. "Trust me, you don't want me babysitting. Candice doesn't want me babysitting just yet, and [month-old Hawkins] sleeps all the time."

Chace and Brooklyn had a busy week. Check them out at the Met Gala: