The couple is renting a Hollywood Hills house while searching for the perfect place to buy, according to People.com.
A source tells the website, "Jen and Justin are very excited about living together in their new home."
Aniston and Theroux have spent much of the summer (11) looking for a love nest after the actress moved out of her Beverly Hills estate, revealing the sprawling property was "too much" for her. She sold the house for $38 million (£23.8 million).
The actress reportedly rented the new home on 1 August (11) and the couple has been living there ever since.