But in real life, Carpenter played a very different role in Hall’s wedding – his bride.
The TV brother and sister are newlyweds, a rep for Hall revealed on Friday.
Craig Bankey, the actor’s rep, told the Associated Press the couple eloped in California on New Year’s Eve.
Hall, 37, and Carpenter, 29, have been dating quietly for a year-and-a-half.
During the wedding ceremony, Carpenter had her grandfather’s wedding band attached to her bouquet of white roses.
On Sunday, the new bride and groom will walk the Golden Globes red carpet together for the first time, Bankey added.
And the couple may find even more reason to celebrate on Sunday night. Hall is up for Best Actor in a Drama Series for his title role in “Dexter,” and the show is nominated for Best Drama Series.