According to People, they met in high school in Belgrade and have been together ever since.
They are tying the knot in a civil ceremony on July 10, a source told AFP.
The source also said that the religious ceremony is two days later, with solely close relatives and friends in attendance.
Read on for the details of their big day.
1. It’s in a Villa in Montenegro
— Novak Djokovic (@DjokerNole) July 6, 2014
The actual ceremony is supposedly at Loggia, which overlooks the Adriatic.
The hotel’s website describes it as having “a wisteria-covered colonnade providing a shady retreat during the summer and one of the most picturesque dining terraces in the Adriatic region.”
Domestic media will not be allowed, but In Serbia reported that exclusive rights to the wedding will cost several thousand euros, all of which will go to charity.
ABC confirmed that the rights to the wedding pictures were sold to Hello magazine.
A source also told the website of the strict guidelines put into place:
Special rules apply to those working at the wedding. Use of mobile phones is permitted outside the hall where the wedding will be organized. Disclosing any kind of information is strictly forbidden and everyone who does so will be rigorously punished.
The photo below was taken at Tivat airport in Montenegro on July 8, as the couple arrived to prepare for the festivities.
2. Jelena Is 6 Months Pregnant
The soon-to-be new parents announced their baby news on Twitter.
On April 24, Djokovic made the announcement, proudly stating, “Jelena is pregnant!!!We will be parents soon! #blessed.”
It seems that because of her pregnancy, Ristic, 28, opted to stay home to watch Wimbledon, tweeting:
— Jelena Ristic (@JelenaRisticNDF) June 30, 2014
3. There Was Talk That Andy Murray’s the Best Man
Djokovic, now 27, has been friends with Andy Murray since they started playing against each other at 12 years old.
Therefore, there was speculation that Murray would serve as the best man at the ceremony.
In a 2011 interview with Tennis X, he dispelled the rumor that Djokovic asked him, saying, “No, he hasn’t. I don’t know where that came from.”
— Mark Stillitano (@MarkStillitano7) April 25, 2014
4. There Will Be Celeb Guests Including Richard Branson
According to the Post, there will be 100-plus guests.
Among the star-studded guest list is Sarah Ferguson, Richard Branson, Andy Murray, Maria Sharapova, Viktor Troicki, Janko Tipsarevic, Ana Ivanovic, Jelena Jankovic and Nenad Zimonjic.
5. They Rescheduled Because of Wimbledon
The Daily Mail reported that the wedding was postponed because the star wanted to focus on Wimbledon.
That decision was for the best, as we saw on July 6, after Djokovic beat Roger Federer earning the title of Wimbledon champion.
In his post-game interview, Djokovic was sure to mention his family, as seen in the video above.
“If you have time, I would like to dedicate this to my future wife and our future baby,” he gushed.
It seems that Djokovic uses his tennis schedule to plan his love life.
He popped the question in September of 2013, which was soon after he won the runner-up title at the US Open.
Novak Djokovic is marrying Jelena Ristic on July 9. She's also six months pregnant with their son. Here's what you need to know about the happy couple.Click here to read more