Former "Friends" star Jennifer Aniston has vowed to be marry boyfriend Justin Theroux by the end of the year.

The 43-year-old actress, who has been dating him since they met on the set of "Wanderlust" two years ago, has told friends that the actor is "the one", Daily Mail reported.

"I'll be married by the end of the year. We're constantly laughing. Now we've got our new baby things are getting serious. We have new responsibilities. Justin and I argue over who takes the dog out and who disciplines her, but that's about it. Things are fabulous. I'm happy," Aniston told her friend.

Aniston, who divorced Brad Pitt in 2005 and then went on to have doomed relationships with Vince Vaughn and John Mayer, has also told close friends that she has "never been so happy". P