Jennifer Aniston is getting ready for her wedding, where she will marry fiance Justin Theroux. But who will serve as Justin Theroux's best man? Reports say there are three possible contenders for best man at Jennifer Aniston's wedding.

Contender 1: Jennifer Aniston's half-brother, AJ Aniston. He's a 24-year-old artist who often lives in a van and has "Live Free" tattooed across his stomach and doesn't like talking about his famous sister, The Huffington Post reports.

"It's been happening since middle school [people asking about the actress]. It's been a pain in my ass for years. No comment," he said.

So why would Justin Theroux want AJ as his best man at his wedding with Jennifer Aniston?

"Justin feels that having AJ act as his best man at the wedding will give him an anchor in the family ... There's no doubt that AJ is quirky, but he's got a good heart and Jen does love him," a family insider told The Inquisitr, adding, "AJ is exactly the kind of person that security would throw out of Jen's wedding. Instead, he'll be front and center at the ceremony."

Contender 2: Ben Stiller. Sources reported earlier this summer that Ben Stiller may be best man at the wedding. The source added to The Sun newspaper: "Jen is going to great lengths to keep the wedding details a secret so it does not become a huge media circus like her wedding to Brad.

"Just a few dozen of their closest family and friends will be there. But news is beginning to leak that the date is just a few weeks away now.

"Ben Stiller, a big buddy of Justin's, has a house over there too so that could be a surprise option."

Contender 3: Theroux's younger brother Sebastian was described as the "perfect contender for his best man."