Hollywood superstar's sweet poem to his doppelganger baby

Doppelgangers are not too uncommon, it is thought that we all have a lookalike somewhere out in the world.

However, one baby has gone viral on Twitter for being the undisputed doppelganger of the Hollywood star Woody Harrelson.

Danielle Grier Mulvenna is the mother to the adorable nine-month-old, Cora, who is at the centre of the viral tweet. 

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"Basically we never saw the resemblance until our friend Chris pointed it out at a BBQ. Then once we took that photo of her laughing it was undeniable," Mulvenna told TODAY in an interview.

Mulvenna then posted a smiling picture of Cora accompanied by a still of Woody Harrelson in Zombieland which amassed over 20,000 retweets and 400,000 likes.

"OK but how does our daughter look like Woody Harreslon" the tweet's caption reads.

Harrelson saw the tweet and posted it to his personal Instagram page along with a poem called Ode to Cora in the post's caption.

"Ode to Cora/ You're an adorable child/ Flattered to be compared/ You have a wonderful smile/ I just wish I had your hair."

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Mulvenna responded under Harrelson's Instagram post, sharing her gratitude for the actor's funny response to the tweet: "You've made our day. Can't wait to show her this when she's older, you have another fan for life xxx."

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Users also sounded off their delight at the precious doppelganger in the comment section.

"Omg! I totally see it! Such a lil cutie pie," gushed one commenter.

"So much better, we had an Uncle Fester look alike at around four months old with our daughter," joked another. '