Top This: A Gay Ceremony on ABC's 'Brothers & Sisters'

The note was a pleasant distraction from the good-natured ribbing he has been taking from his co-stars. "Luke and I were rehearsing who was to stand where, which would put one of us in the woman's position, and a few comments were made," says Rhys. "And neither of us was going to wear a white suit while the other wore black."

Dave Annable and Balthazar Getty, who play Kevin's brothers, have been engaging in their own teasing over Tommy being best man. "Dave's been locked in his dressing room, crying," jokes Getty. And Annable retorts: "Balthazar couldn't handle not being best man."

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Both Sally Field (matriarch Nora) and Emily VanCamp (Rebecca) have come to set nursing colds, and producer/director Ken Olin has noticed that the other actors are avoiding hugging them on camera. Conspicuously absent from the gathering is Sarah's (Rachel Griffiths) love interest (Steven Weber), who will not return for Season 3. But her character's two young kids are there, and Griffiths wonders if some viewers will "have a problem with that."

She hopes not, but the liberal-leaning show does attempt to recognize those who oppose gay marriage by introducing Scotty's disapproving parents, who skip the ceremony. That volatile relationship is expected to be explored in Season 3. Another possibility: children.

"It would be interesting to go down the adoption route and see from a legal aspect how Kevin would campaign for that," says Rhys, whose character is an attorney.

Adds Macfarlane: "Kitty makes a speech about Scotty and Kevin building a family, which hopefully is foreshadowing."

Executive producer Monica Breen assures, "They will be a family. Kevin deserves a stable relationship in the same way that Kitty, Sarah and all the others deserve it. He will be facing many questions in his life — but now he has someone to share that with."