The couple met in 2007 when Roddick, 26, asked his agent to contact Decker's agent after seeing her in Sports Illustrated.
He proposed to Decker in March 2008, but said they weren't in any rush to walk down the aisle.
"With their hectic travel schedules, Andy and Brooklyn plan to enjoy their engagement," said a statement posted on their Web site then.Hopefully we'll get some wedding photos soon. I'll keep you guys updated!
According to the many sources available online, the nuptials will be "very small. Just friends and family. Not a big Hollywood crowd as they're not like that."
The New York Post, which first reported the news, says Decker, 21, and her bridesmaids "had a big bachelorette weekend in Chapel Hill, NC" last weekend.
"They just bounced around and had a great time," added the paper.