By Breaking Celebrity News Staff

Drew Barrymore and Will Kopelman said "I do" Saturday night at the bride's estate in Montecito, California.

Wearing a magnificent custom-designed Chanel gown, Drew glowed as she exchanged vows with debonair Will, an art consultant.

It was an intimate group of just over a hundred of the couple's family and closest friends who attended the nuptials.

The pregnant bride's Charlie's Angels costar Cameron Diaz was there. So were her production company partner Nancy Juvonen and her husband, Jimmy Fallon.

Among Will's family -- his dad is the former CEO of Chanel -- in attendance was his best-selling author sister, Jill Kargman.

The ceremony took place at the Colonial-style mansion Drew bought two years ago for $5.7 million, before she'd even met Will.

She's been driving the 90 miles up from L.A., making frequent visits to the home in recent months, supervising final renovations to the property.  The couple is expected to split their time between Montecito and Manhattan.