The Iron Man star hit the stage with Sting and killed it when he started crooning The Police's classic song "Driven to Tears."
In the 2011 video, which surfaced recently, the acclaimed actor rocked the house with his stellar voice, performing with the rocker for his 60th birthday bash in a chic black suit.
The performance went down at New York City's Beacon Theater at the time, and had the sold-out crowd on their feet, according to the New York Daily News.
Robert not only sang with Sting, but he also shared the stage with Stevie Wonder, Billy Joel, Mary J. Blige, Herbie Hancock, Will.i.am., Lady Gaga and Bruce Springstreet that night.
Talk about a nice birthday surprise.
Perhaps Robert should consider a second career-as a rock star!