Bella Thorne is an "open book".

Bella Thorne

Bella Thorne

The 'Midnight Sun' star has no holds barred when it comes to her social media accounts but she admits she is struggling to get her boyfriend Tyler Posey to do the same.

She said: "I'm like an open book. But that's what I think that my fans enjoy about me the most, is that they feel like they really know me. And they do, they really f***ing know me.

"He doesn't post a lot on social media so it's been ... that's like the only thing that's been interesting is that I'm so about the socials and he isn't. It's a little bit of like, teaching and learning and pushing and pulling."

However, when the couple do both post on social media, they find the same sort of posts funny.

She told Entertainment Tonight: "I was on Snapchat the other day and I did this Snapchat talking about farting, and I literally go on baby's Snapchat and he literally has a snap where he farts on the camera -- it's so funny. I was like, 'Oh my God, me and my baby.' We're the same person."

Since they started dating, the pair have been inseparable, regularly posting cute messages to each other online.

In one post, Bella captioned a picture of herself in a bikini straddling her boyfriend: "Pool vibes with my baby #myman #mcm #mancrusheveryday (sic)"

And Tyler's posts are equally sweet. Writing to mark her birthday, he shared: "I love these women. My red haired beauties. Happy birthday my love @bellathorne ... sorry I was a couple hours late, I was too distracted by your face (sic)"