Missy Elliott & Pharrell Working Together

Andrew H. Walker/Getty Images for H&M
Missy Elliott performs at the Alexander Wang X H&M Launch on October 16, 2014 in New York City.  

Missy Elliott and Pharrell Williams are working together, according to a tweet Elliott posted Thursday. 

Missy Elliott Heats Up Already-Massive Jack Ü Single 'Take Ü There'

The seminal rapper shouted out her and Williams' home state Virginia, with the "two up, two down" hand sign call, saying they're "hard at work."

The two shared the stage recently at the 2014 BET Awards when Pharrell surprised the crowd, bringing out Elliott to perform "Pass That Dutch" during his opening set.

Missy Elliott's Song Sales Surge by 282 Percent in Week After Super Bowl

It was reported earlier this month that Elliott has been in the studio with longtime friend and collaborator Timbaland, working on new music.