The clip shared on Twitter hones in a member of the public bouncing their leg up and down, before panning round to show Wood doing the same.
“Knees up on the Tube. Heading to the #Brits2020,” the caption said.
The camera then moves upwards to show the star, who smiles and says “hi”.
Fans were quick to comment online about the fact that Wood, 72, was travelling on the Underground.
“Why are you never on the Tube when I go on it?” asked one person on Twitter.
“Fair play to you Ron – still man of the people!” said another, while one posted: “Love that you’re on public transport, love you’re so down to earth.”