Jennifer Aniston and Justin Theroux were beaming while at dinner with Courteney Cox this week.

The pair became engaged just weeks ago and it is rumoured that they are diving headfirst into wedding planning.

Jennifer and Justin reportedly spoke with Courteney about details of their upcoming nuptials at Sunset Tower Hotel in Los Angeles this week.

The trio appeared content about what they were discussing.

"They were very calm and carrying on a regular dinner conversation," a source told People magazine.

"Jennifer had a big smile on her face. She and Justin both looked very happy."

Jennifer was dressed in comfortable clothing, but looked radiant nonetheless.

"Jennifer looked adorable," an onlooker detailed.

"She looked so pulled together and very chic. She was dressed casually but in heels."

There is speculation that Jennifer and Justin want a relaxed ceremony, and sources have tipped the stars to choose a romantic beach wedding in either Mexico or Hawaii.