While they are there Bella becomes pregnant with a baby that turns out to be half human half vampire.
Filming on the new movie officially began last week in Baton Rouge, Louisiana, and is expected to continue in Vancouver.

But during filming they were spotted kissing and being romantic in the middle of a busy Rio street as part of scenes depicting the couples honeymoon parts of which were also filmed on the isle of Esme just off of the coast.
The storyline in Breaking Dawn follows Edward and Bella as they get married and jet off on their honeymoon.
Though Pattinson has recently asserted his bachelor status to Ellen De Generes in an interview set to air this Friday, dedicated RP followers will note that the 22-year-old actor has already been photographed with Belle in public before, at a Hollywood Film Festival Awards afterparty back in October.
Then again, Belle's fans would counter that she's already rumored to be dating Pattinson's British actor pal, Tom Sturridge.
Robert Pattinson and Kristen Stewart arrived in Rio yesterday to continue filming the final instalment of the Twilight series.
Wearing her usual getup of skinny jeans and a jacket, Kristen looked comfortable yet chic whilst Rob kept it low-key in beige trousers and a jacket.
Breaking Dawn, the fourth book in Stephanie Meyer's Twilight series, will be broken down into two movies with the first part in cinemas next year and the second half to be released in 2012.
It looks like the pop singer's new girlfriend, Brazilian American actress Camilla Belle has already been spotted flirting with another heartthrob in Hollywood--Twilight star Robert Pattinson. MTV News reports that just days after Camilla went on a mini-vacay with all of the Jonas Brothers in Mexico, she went solo to the red carpet premiere of the highly anticipated vampire flick, Twilight, in L. Pics were snapped of a Jonas-free Belle and Pattinson posing together on the carpet, while spywitnesses say that the two were hanging out together throughout the night and at the premiere's afterparty.
when in Brazil, find a smoking hot Brazilian model.
The Biebs is making the most out of his tour stop in Rio de Janeiro by spending a lot of time with Luciana Chamone. there's a promoter working on extending the South American swing of this tour right now.
After just over a week in Brazil it is time for the Twilight love birds to fly home.