E! News has learned that the couple's divorce was finalized after the court approved their stipulated judgment on Nov 27.
The brunette actress filed for divorce from the Gangster Squad star on Feb. 15 after the couple had been married for eight years and six months.
But according to sources at the time, the two didn't split on bad terms.
"It is very amicable," an insider told E! News. "It's not ugly, it's just over."
This marks the second divorce for both the 48-year-old beauty and Brolin. From 1988 to 1994, Lane was married to actor Christopher Lambert; during the same time, Brolin was married to actress Alice Adair.
The two have no children together. However, Lane has a daughter, Eleanor, from her first marriage, and Brolin has two children, Trevor and Eden, from his marriage to Adair.
Lane is currently getting ready to film Batman vs. Superman, while Brolin checked into a rehabilitation facility earlier this month.
In the February 2013 issue of Men's Journal, he revealed that he began experimenting with drugs during his teen years in Montecito, Calif. He joined a surf gang called the Cito Rats and stole car parts to buy "drums and drugs," he recalled.
"I was the last [gang member] to get into heroin—I smoked it and the first to get out. I was around 16 or 17, so it was around the time of The Goonies," Brolin admitted. "But I liked working and learning, so it was very difficult for me to lend myself to that drug completely."