Jennifer Aniston Vacations in Mexico with Courteney Cox, Justin Theroux

12/29/2013 AT 1:00 PM ET

Baby, it’s cold outside – unless you’re Jennifer Aniston.

Justin Theroux and Jennifer Aniston

Clasos.com/Splash News Online
The actress is trading winter wear for her bikini on a post-holiday Los Cabos, Mexico, getaway (one of her favorite spots) with fiancé Justin Theroux and a few very famous friends, including repeat vacation buds.

Also soaking up the sun on Saturday: Courteney Cox, also showing off her bikini figure. Other Cabo visitors include Howard Stern and wife Beth, and Jimmy Kimmel and his wife Molly McNearney.

Aniston and Theroux were snapped showing off their swimwear (and enviable bods). And, yes, the actress also flaunted her full head of hair.

Think the new year has a wedding in store for the happy couple?

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