According to insiders, Drew Barrymore wants her favorite co-star Adam Sandler to be her best man when she marries fiancé Will Kopelman in a traditional Jewish ceremony later this year.

Adam and 36-year-old Drew Barrymore have grown so close while working on several movies together that "he's even helping her with the process of converting to Judaism," a source says.

"Those two absolutely adore each other, so it only made sense to Drew that he will be right by her side playing an important role at her wedding."

Although her reps deny the story, Drew, who has gotten very close to Will's family, has told them she will raise their children Jewish, says a friend of the couple.

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