They have been engaged since 2003 and they already have a kid but they finally decided to make it official. People reports:
Actor Casey Affleck and his girlfriend of six years, Summer Phoenix, got married over the weekend, PEOPLE has learned.
Affleck, 30, is the younger brother of Ben Affleck; Phoenix, 28, is the younger sister of actors Joaquin and the late River Phoenix.
The couple first met through Joaquin Phoenix, Affleck's good friend since they costarred in 1995's To Die For. They became engaged in New York City over the 2003 Christmas holidays. Their son, Indiana August, was born May 31, 2004, in Amsterdam.
Congrats to the happy couple. Must be a big fun filled family summer for the Affleck family as Ben directs his brother in his directorial debut.