They're not married just yet, but it looks like Jennifer Aniston and Justin Theroux are looking to make some big changes in their life. The celebrity couple is looking to sell their massive Bel Air Mansion, despite the fact that she spent the last two years renovating it.

Jennifer Aniston, Justin Theroux Put Their Wedding On Hold Again?

According to reports over the weekend, Aniston and Theroux are looking to actually downgrade to a much smaller, "modern" home for just the two of them. Aniston and Theroux bought the home back in 2012, and it boats over $5 million dollars in upgrades and renovations, including a $100,000 marble sauna and a boutique kitchen.

"It's not officially listed, as Jen's got a property mediator sourcing potential buyers first. She wants to see if she can get a good return on it before placing it on the market. If that happens she's looking into buying a new penthouse in New York, and keeping her Hollywood hills property as an LA base," a source said, according to The Belfast Telegraph, published on Monday.

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The paper also says that Aniston and Theroux's asking price is around $38 million.

Meanwhile, Theroux made his fiancée "squeal with delight" when he recently surprised her at work.

The couple, who have been dating since 2011, have not made any public comments about their upcoming wedding, but seem to be doing well in their relationship by spicing things up and surprising each other when they least expect it. Theroux visited Aniston on a photo shoot with her business partner Chris McMillan just last week.

"Justin actually showed up as a surprise to Jen," a source tells Us Weekly. "He turned up a couple of hours into the shoot. She was nearing the end of the shoot when he snuck in to say 'Hi.'"

The source added, "She clearly wasn't expecting to see Justin because she squealed when he showed up. They hugged and he gave her a kiss and then he watched the end of the job."