Bride-to-be Katherine Heigl plans to celebrate her first wedding anniversary next December as a first-time mom. The Knocked Up star will wed singer/songwriter Josh Kelley this weekend in Utah - and she's already rushing to the next stage of her relationship.

She says, "I'm super excited to start a family. I've always wanted a family, a large family. In, like, a year (we'll have kids)."

The actress has to complete a series of promotional commitments this week before dashing back to her native Utah for the Christmas wedding, and she admits she's beginning to panic.

She adds, "I'm worrying about all the details and getting there, travelling, transportation, talking to the pastor, getting the license."

But she insists she isn't having second thoughts about becoming Mrs. Kelley: "We've talked a lot about it - 'Are you having second thoughts here?' And he's like, 'No, I'm so ready for this to happen, because it's already been 18 months of planning and we're both just ready for this to happen.'"