Barbra Streisand made Josh Brolin and Diane Lane's just-finalized divorce one of the smoothest ever, Breaking Celebrity News has learned.

Although Streisand is married to Josh's father, James Brolin, "She made it clear she would help Diane get everything she needed in her split from her own husband's son," a source revealed.

Both Josh and Diane have grown children from previous marriages and the source noted, "Barbra made it clear the divorce needed to go smoothly for the sake of the kids."

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"The Way We Were" singer "knew that Josh was kind-of a nightmare husband,” the insider added.

2013 got off to a rough start for the W star, who was detained in Santa Monica just before midnight on January 1 for public intoxication after getting a little too involved in the holiday revelry.

“New Year’s, that’s what happened!” he laughed afterwards.