Everyone at NYC ad agency R/GA surprised its CEO by dressing up as him for Halloween

The CEO of New York City-based ad agency R/GA, Bob Greenberg, has a signature style: A black shirt, a black scarf, black pants, topped off with a black beret.

This Halloween, R/GA staffers decided to pull a surprise on their longtime leader by dressing up as him, as AgencySpy's Patrick Coffee first reported on Monday.

The agency had been planning to pull the stunt for a while, but only finally plucked up to the courage to do it on Monday, according to AgencySpy.

A source inside the agency told Business Insider Greenberg was told to attend a meeting, but then arrived to find dozens of Greenberg clones on the agency's staircase. We're told he took it in good humor.

Here's Bob with his army of Bobs:

Dimitrios Kambouris/Getty Images

NOW WATCH: The richest village in China is one of the most mysterious places on earth

Now check out celebs' Halloween costumes:

See Also:

• Hacked email suggests Donna Brazile leaked question to Hillary Clinton campaign ahead of CNN primary debate

• I've tested over 100 headphones in the past year, and I keep coming back to this $26 pair

• Anthony Bourdain explains why, even after touring 80 countries, his favorite destination will always be Japan

SEE ALSO: Martin Sorrell says WPP will spend $5 billion with Google this year — and they're better to deal with than Facebook