According to New York Post's Page Six column, the Avengers star has tied the knot with French journalist boyfriend Romain Dauriac.
Sources told the newspaper that Scarlett and Romain married in secret following the birth of their daughter Rose Dorothy in September.
Dorothy is a tribute to Scarlett's grandmother.
As you'd expect from such a private couple, they haven't actually confirmed the happy news and no details about the reported ceremony have been released, although sources claim it happened in the US.
Scarlett and Romain have always kept their romance away from the spotlight. An engagement was speculated in September 2013 after Scarlett was pictured wearing a diamond ring at the Venice Film Festival.
It's believed the couple met in early 2013 via a mutual friend.
Scarlett has been married once before to actor Ryan Reynolds. They married in September 2008 but announced their split in December 2010.
Ryan is now married to actress Blake Lively, who is expecting a child.
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