"License to Wed" is billed as a romantic comedy, but for star Mandy Moore, the movie sometimes came off like a horror show. After all, those two creepy-looking simulated babies that are featured in the trailers and television spots put the "Good Guy" doll Chucky of "Child's Play" fame to shame.

"I found myself starring at them because they were so odd looking," Moore said with a laugh during a recent @ The Movies interview. "They looked like little old men. Plus, they were also unbelievably heavy and smelled really bad."

The great thing is that the uproarious electronic baby training exercises are only a few of many engaging scenes in "License to Wed," which opens in theaters Tuesday.

Moore plays Sadie Jones, an enterprising florist who accepts a marriage proposal from Ben Murphy (John Krasinski) after a blissful, fight-free six-month courtship. But while Ben wants to whisk Sadie away for a quick ceremony in a casual setting, Sadie is set on getting married in the family church.

Granting Sadie's wishes, Ben accompanies his new bride-to-be to St. Augustine's to meet the Rev. Frank (Robin Williams) -- a hip but eccentric pastor who informs the couple that in order to perform the nuptials, they must first complete his "foolproof" marriage prep course.

The trouble is the three-month course is compacted into a three-week window before the wedding, tossing Ben and Sadie headlong into a dizzying series of events that loads them with homework, invades their privacy and puts their love for each other to a test.

It doesn't take but a few seconds into a conversation with Moore to recognize her genuine humility. She has no problems making glowing comments about her co-stars and gives off no sense of self-importance whatsoever when discussing her own accomplishments in both music and movies.

She even downplays her significance in the movie, even while there's no doubt that she's is a vital part of the chemistry that makes the scenes between the trio work. Moore would only say that she "participated but didn't have to do any of the heavy lifting."

"I felt lucky that onus wasn't on me in this movie to be funny," Moore said. "I just got to sit back and take this wild ride with John and Robin and get to laugh the whole time and enjoy myself in their company."

More Of Moore

While artists have a tough enough time sustaining a successful career in music or film, Moore has successfully managed to do both -- and at age 23, to boot. She said she doesn't necessarily have an explanation as to why, other than good, old-fashioned hard work.

"I take my jobs quite seriously," Moore said. "I've just been very lucky that people have accepted me doing both."

"License to Wed" is the second major event in two weeks for Moore. Last month she released her new album, "Wild Hope," which comes on the heels of four successful CDs, starting in 1999 with the then-16-year-old's platinum-selling debut, "So Real."

While Moore's breakthrough role in films came with the poignant 2002 drama "A Walk to Remember," she has since gone on to do a number of comedies, including "Saved!" "American Dreamz" and most recently, "Because I Said So."

And despite those experiences, Moore admitted that nothing could have really prepared her for working with the maestro of laughs in Robin Williams in "License to Wed."

"He has a style all of his own," Moore enthused. "Working with him was just such of a treat. He's such of a gem and is sweet and so humble. To see someone's who's had such longevity in their career and still be the best at what they do, yet be a good guy and respect, it was a great lesson."

Moore said that she got to experience the best of both comedic worlds on the film because, while Williams is known for broad sort of comedy, Krasinki, one of the stars of the hit sitcom "The Office," is on the other end of the spectrum.

"He has a very subtle sense of humor, but it's the perfect sensibility needed to work with Robin. They play off of each other so well," Moore gushed. "Man o' live, John is going to be a big, big movie star -- we were really lucky that we got the chance to work with him first."