Jennifer Aniston & Justin Theroux Chill With Emily Blunt, John Krasinski, Jimmy Kimmel in Cabo

Newly engaged couple spends some quality time with their famous friends

How's this for a celebrity sighting?

As if seeing Jennifer Aniston (and her beautiful bikini bod) while she vacations in Cabo San Lucas with fiancé Justin Theroux wasn't enough, along comes Emily Blunt, John Krasinski, Jimmy Kimmel and fiancée Molly McNearney.

All three couples hung out in Mexico on Thursday for a little post-Christmas get-together.

The six friends appeared to be very relaxed as they lounged outside on a terrace.

Of course, it wasn't long before Aniston was back to sunbathing.

Not that we're complaining!