They are almost indistinguishable -- even though, at the age of 35, Wood is a clear 9 years older than his A-list doppelgänger.
The clip has been seen more than 7.6 million times since it was posted to Imgur on Thursday.
It's also sparked a host of other gifs, including this absolute gem:
The similarity between the duo is obviously not news to Radcliffe, however.
"We're both kind of short guys with big blue eyes and brown hair," he told Marc Maron's "WTF" podcast in November, adding that the confusion may also come from having appeared "in fantasy movies that came out at the same time."
Radcliffe also revealed on the United Kingdom's "The Graham Norton Show" in 2012 that he a fan once gave him a photo of Wood to sign on the red carpet in Japan for a movie premiere -- and he obliged.
"There is no time in that moment to explain to them in a language that is not their first that this is not me," he said. "So I just wrote 'I am not Elijah Wood, love Daniel Radcliffe.'"
Watch that clip here: