Katherine Heigl is "super excited" about starting a large family with fiance Josh Kelley once the wedding is over and done with. She sat down with Extra TV! and fessed up about her baby plans.

"I'm super excited to start a family," she gushed. "I've always wanted a family, a large family. But I saw that now!"

How soon?

"I'd like to say like a year," she said.

A little Heigl! Can't wait! After 18 months of planning this couple is ready to tie the knot.

"I'm mostly panicking about all the details, and getting there, traveling, transportation, talking to the pastor, getting the license," Katherine confessed to "Extra.""We've talked a lot about it, like, "Are you having any second thoughts here?'" she said. "And he's like, "No, I'm so ready for this to happen.' It's already been 18 months of planning and we're both just ready for this to happen already."

Stay tuned for ceremony shots.  The couple is planning to get married next week in Utah.