It's almost time for Making a Murderer to return for Season 2 — and there is still a lot that fans do not know about Steven Avery.

Fans of the hit Netflix series know that Steven may have been wrongfully convicted to a life prison sentence for murdering Teresa Halbach back in 2005, but that is not all.

MORE: Here's Everything We Know So Far About 'Making a Murderer' Season 2

Keeping reading to learn more about Steven Avery!

steven avery
Netflix

1. He is a father.

Steven has four kids with Lori Mathiesen named Rachel, Jenny, and twins Steven and Will. Their relationship was strained when he was found guilty of the rape of Penny Beernsten shortly after their twins were born.

A source revealed that today, "four or five [of the children] have said Avery should not have been let out of prison [the first time]."

2. He is serving his sentence at Waupun Correctional Institution in Wisconsin.

You know, in case you want to send a letter or visit.

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3. He wants Brad Pitt to play him in a movie.

Steven exclusively revealed to In Touch back in September that he would like to see the story of his life play out on the big screen with the A-list actor in the starring role.

He said he wanted to write a memoir “on [my] life, how prison was, what [I] went through.”

steven avery netflix
Netflix

4. He has an incredibly low IQ.

ABC reports Steven's IQ is 70 and according to his public defender Reesa Evans, he "barely functioned in school."

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5. He recently got engaged while serving his sentence, though the couple has since broken things off.

His ex-fiancée Lynn Hartman shared the troubling letters he used to send her from behind bars after he split from her by having his lawyer send a legal letter in October.

“Don’t ever tell me to never stop calling again or you will make me mad,” he wrote. “I don't want to hurt you or the kids! So you have to promise me you will help us forever.”

He even told Lynn to “through [sic] out this letter or burn it. Destroyed by fire this letter [sic].”

You can catch up with Season 1 of Making a Murderer now on Netflix.