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:

bob skitchDimitrios Kambouris/Getty Images

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Now check out celebs' Halloween costumes:

Social Scene: Week of Oct. 24
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Social Scene: Week of Oct. 24
thanks for joining our dinner tonight ๐Ÿ’€
๐ŸŽ€๐Ÿ‘๐ŸŽƒ๐ŸŽƒ๐Ÿ‘๐ŸŽ€ #halloweencostume #halloweenisaworkout #halloween #everydaywewearpink and no filter
Happy Halloween!! May the power be with you. โšก๏ธ
Having a little pre party before I take office #IMWITHME Cheers to @svedkavodkaย ย #howtosvedka @hillaryclinton ๐Ÿธโœจ
Winifred Sanderson flies in to Hulaween! Says thanks to everyone who made it such an electrifying evening!!
Dorothy and scarecrow #halloween
Thanks @COVERGIRL for keeping everyone clean-cut and QT at Hudson High, Home of the Poodles. ๐Ÿ’‹, Principal Hudson. #KatyxCOVERGIRL
Halloween is just around the corner and it's TIME TO GET WEIRD (Part III) !! #halloween2016 #timetogetweird @powerrangers #powerrangers ๐Ÿ˜‚โœŠ๐Ÿผ๐Ÿ˜† #moretocome
Holiday times ๐Ÿ˜˜
Happy Halloween ๐Ÿ‘ป๐Ÿ’€๐ŸŽƒ
All gold everything ๐ŸŒŸ
What an incredible night with my Puddin, @reneemmorrison Great to celebrate another year on this ๐ŸŒŽ Thank you to the people who worked so hard to the epic party on! #morrisonadventures #halloween #harleyquinn #joker #birthdayboy๐ŸŽ‰
For the world wide WEB CIROC MANGO. TRY IT!
When you give em that "I just killed my brother, Mufasa" look ๐Ÿ‘€ ๐Ÿฆ #circleoflife
"Been shopping with Dr. Seuss?" ๐Ÿ’๐Ÿฝ
#Halloween or #Character ๐Ÿค” ๐Ÿ’‹๐Ÿ’‹๐Ÿ’‹
Happy #Halloween #Weekend
Last night we morphed into a country band. #yugecountryguys
Nailed it, then I bailed!! I-CON-IC ๐Ÿธ@iambranden
A last minute costume change resulted in one of my favorite looks so far! I'm Elphaba and Mr. Freeze's love child Elsaba the fashion witch. #ParsonsAlum #halloweenie makeup by: @makeupholicliz
Happy birthday Hudson! ๐ŸŽ‚ #SockHop
๐Ÿ’ƒComin for you๐Ÿ’ƒ@katyperry #BirthdayGirl ๐ŸŽ‚
#imwithher Best of the night โœจ๐ŸŽƒโœจ
#aboutlastnight #HudsonHigh #detention -had a blast celebrating miss @katyperry
๐Ÿ”ฎ#rumneygirl GYPSYLYFE
(When you're a little shit and way to lazy to do anything for Halloween but this fire ass edit makes you look like you went all out...so you're gonna roll with it lmao)

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