The 30-year-old actress filed the petition on Monday (May 23), citing irreconcilable differences, according to TMZ. The documents say they separated on May 22.
Amber and Johnny got married back in February 2015.
Sources tell the site that the couple did not have a prenuptial agreement and she is asking for spousal support.
Just last month, the couple issued an apology video to the people of Australia for bringing their two dogs into the country last year with a false immigration document and without going through the required 10 day quarantine period.