Jennifer Aniston has vowed to be married by the end of the year.
Jennifer Aniston - who has been dating Justin Theroux since they met on the set of 'Wanderlust' two years ago - has told pals the actor is "the one" and has even joked that she has issued him with an ultimatum to have wed her by the time the year draws.
Meanwhile, the star explained the couple's new dog Sophie, a boxer-pitbull cross, is a "test run" for having children.
The Daily Mirror quotes Jennifer as telling a pal: "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.
"She's like a test run for kids, I guess ... although hopefully kids are easier to house-train. 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.
"If he's not got down on one knee, or we're mot married, by the end of the year, it's over!"
Jennifer - who divorced Brad Pitt in 2005 and then went on to have doomed relationships with Vince Vaughn and John Mayer - has also told pals she has "never been so happy".
A friend added: "Jennifer has never been so happy romantically. She and Justin have discussed their long-term future and both agreed that they love the idea of settling down.
"The onus is now on Justin to pop the question."