Ever since Star Wars: The Force Awakens came out in theaters, there has been a lot of speculation about the truth behind Rey's lineage.

Honestly, no one would be surprised if Luke Skywalker ended up being her dad — which is exactly why he is least likely to be the father.

Since the truth has yet to be revealed, fans are left to speculate, and every character from Obi Wan Kenobi to even Han Solo have been named as Rey's M.I.A. bio-dad.

But perhaps the real question we should be asking is, "who's your grandpa?"

One theory, which originated on Medium, has been broken down by YouTube user Vincent Vendetta, that points to Emporer Palpatine as Rey's grandfather — revealing the truth of her Force-wielding powers.

Here's how it breaks out, more details are in the video above and on Medium.

1. Her fighting style is almost exactly the same as Palpatine's.

Rey and Palpatine are the only two characters to use a forward thrust with a light saber. In fact, the first time you see both of them fight, they both use this as their first move. Choreography is never an accident.

2. Rey has a special relationship with the Dark Side.

Rey's anger comes out in many ways. On Jakku, as she's being interrogated by Kylo Ren and during her final battle in the forest. Vendetta even points to the film's script where it says specifically where she is tempted to kill Kylo Ren but stops.

The novelization of the movie also mentions an "unidentifiable voice" that urges Rey to kill Kylo Ren, which people have theorized to be Palpatine, instead of Supreme Leader Snoke.

3. Luke is a predictable choice.

The amount of heavy-handed pointing that has been done toward Luke being the father makes any affirmation of that theory poor storytelling. It's expected. More over, it makes practically everyone in the move a Skywalker. We need some tension.

Additionally, in the Star Wars novel, Bloodline, it states that Leia was in contact with Luke when he was creating the new Jedi academy, so she would have known if he had a family.

Besides, Han and Leia didn't even recognize Rey when they met her again — pretty sure they'd know their own niece no matter how long it's been and no matter how deep a secret they wanted to keep.

4. Rey has an accent.

John Boyega and Daisy Ridley both have English accents and yet, Boyega had to change his for the film. If you remember, Palpatine also had an English accent.

5. Rey was left on Jakku for a reason.

Rey was sadly abandoned on Jakku because she had to be hidden. Because Luke found out Snoke was meddling with Ben Solo, he had to make sure Snoke couldn't find her. Hence, she had to be left on a remote planet where no one could find her.

6. Kylo Ren knows her.

When Rey Force-grabs the lightsaber, Kylo Ren mysteriously "knows" her. This may be because they met as children at Luke's new Jedi academy — but Rey doesn't remember. This is unsettling to Rey.

7. Palpatine's voice can be heard in Rey's Force vision.

There's little reason for Palpatine's voice to manifest itself to Rey unless he has a connection to her.

Vendetta even points to a moment when Kylo Ren actually saves Rey's life. This may be because he is aware of her true identity, and since Ren has given into the Dark Side, he definitely wants her alive so that they can rule the galaxy together as Darth Vader wanted.

8. Rey is positioned somewhere in the middle.

The imagery for the film also tells a story. While Vendetta says Rey "looks pretty evil," (we would just say "determined") on The Force Awakens poster, she is positioned slightly off toward the middle-left. You might say she's not evil, but definitely being tempted by the Dark Side.

9. It's just good storytelling.

Star Wars has always been about a Skywalker versus a Palpatine ("Anakin vs. Palpatine, Luke vs. Palpatine, Kylo Ren vs. Palpatine"). As Vendetta points out, this time the roles are reversed, with a Palpatine on the Light side, but the sides are still very balanced — just like the Force, you might say.

It's complimentary to the first trilogy, it makes a good story and it's reflective of every great saga every told. We say this one has legs to stand on.