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"My man @sterlingkbrown has moves #nbc #thisisus #dancing #robot," Hough captioned a video of their dance-off.
My man @sterlingkbrown has moves #nbc #thisisus #dancing #robot
A post shared by Derek Hough (@derekhough) on Aug 11, 2017 at 4:29pm PDT
Though it's unclear what prompted the battle, this isn't the first time Brown has gotten down on Instagram. In fact, the actor posted another "impromptu dance session" last Sunday.
A little impromptu dance session with my homey @nichelle egging me on! #goodtimes
A post shared by Sterling Brown (@sterlingkbrown) on Aug 6, 2017 at 5:40pm PDT
EXCLUSIVE: Why Sterling K. Brown Is Keeping It All in Perspective
While Brown gets his boogie on, his This Is Us mom, Mandy Moore, has been hard at work.
"And that's a wrap on episode 3 for me.Read more at Entertainment Tonight