George Clooney
Krasinski and Blunt have enjoyed a longtime friendship with Mr. Clooney, having double dated with the stud over the course of his many relationships. They were spotted stepping out for a sushi date with the actor's new love Amal Alamuddin on March 27.
Jennifer Aniston & Justin Theroux
The celeb couples vacationed together in Cabo and enjoyed a little post-Christmas R&R with married pals Jimmy Kimmel and Molly McNearney. All six friends appeared to be very relaxed as they hung out by the terrace. Talk about a star sighting!
Kristen Bell
The Veronica Mars star attended Blunt's star-studded baby shower back in December 2013.
Stanley Tucci
So sweet! The two strike an adorable pose at the 15th annual Critics' Choice Awards in Hollywood, Calif. Fun fact: Tucci is Blunt's brother-in-law and he also attended the couple's wedding!
Amy Poehler
Of course the former Office star is pals with the Queen of Comedy!
Jimmy Kimmel & Molly McNearney
The funnyman has previously pranked his pals and also vacationed with the couple and his wife!
Colin Firth
Blunt got chummy with the fellow Brit when they shot the indie dramedy Arthur Newman together, and they apparently enjoyed a happy reunion at the Tinker Tailor Soldier Spy after-party.
Matt & Luciana Damon
The BFFs are all smiles while posing together at the Gotham Film Awards.
Bradley Cooper
Jen and Justin aren't the only couple that John and Emily vacation with! A then-pregnant Blunt enjoyed a fun-filled getaway in Hawaii with her hubby and their pal.
Meryl Streep
The Oscar winner attended the twosome's wedding.
Sean Penn
The couple chats with the Oscar winner backstage at the 15th Annual Screen Actors Guild Awards. Clearly, Penn was in a jovial mood based on the smile on John's face!