The British actress and her funnyman husband joined U.S. TV personality Jimmy Kimmel and his writer fiancee Molly McNearney on a flight to Cabo San Lucas from Los Angeles International Airport on Thursday (27Dec12).
The group then met up with Aniston and Theroux, who have been enjoying the sun in Mexico since before Christmas (25Dec12).
A source tells Us Weekly, ""They spent the afternoon lounging around and having drinks (at Aniston's house). They seemed to all be really good friends and comfortable around each other. Emily was lying in John's lap, and Jen had her arms around Justin. They were there all afternoon until sunset, laughing and having great conversation... The group looked very excited to be vacationing together.""