The Jimmy Kimmel Live! presenter exchanged vows with partner Molly MCNearney in Ojai, California, and several of his famous friends were in attendance.
Affleck's wife Jennifer Garner also attended, as did Damon's partner Luciana, and Aniston was escorted to the bash by her fiance Justin Theroux.
Ellen DeGeneres and Portia De Rossi, and Emily Blunt and John Krasinski were also there to toast the happy couple.
Kimmel and MCNearney marked their impending nuptials on Friday (12Jul13) with a star-studded rehearsal dinner, according to UsMagazine.com.
Kimmel was previously married for 14 years and has two children from the relationship.