The couple wed at the Ojai Presbyterian Church in the town of Ojai north of Los Angeles and had a gospel choir sang "Bless the Broken Road" by Rascal Flatts as the ceremony began, People magazine reported Sunday.
Walsh, 39, wore a custom-made Monique Lhuillier wedding gown as she and Young, 36, exchanged vows in front of about 100 guests, including Katherine Heigl, Chandra Wilson, Sara Ramirez and Justin Chambers, as well as the creator of “Grey’s,” Shonda Rhimes.
Actress Kate Beckinsale and her director husband Len Wisema also attended.
Walsh and Young, a production co-president at 20th Century Fox, met in February and became engaged just three months later.
"I know -- I'm literally living the dream," Walsh told People. "But you know when you know. I was not expecting it, so it's kind of amazing."