Rebecca Albertalli is an American author of young adult fiction, known for Simon vs. the Homo Sapiens Agenda (2015)

Simon vs. the Homo Sapiens Agenda was adapted into the 2018 film Love, Simon and inspired the spin-off television series Love, Victor. A sequel to Simon vs. the Homo Sapiens Agenda, titled Leah on the Offbeat was released in 2018 and won the Goodreads Choice Award for Best Young Adult Fiction. The "Simonverse" currently includes four books. 

On August 31, 2020, Becky Albertalli came out as bi in an essay on Medium. In the essay, she talks about a journey that is familiar to a lot of bi people. 

I’m pretty sure I’ve had crushes on boys and girls for most of my life. I just didn’t realize the girl crushes were crushes. Every so often, I’d feel this sort of pull toward some girl I vaguely knew from school or camp or after-school dance class. I’d be a little preoccupied for a few weeks with how cool or cute or interesting she was, and how much I wanted to be her friend. It just never occurred to me that these feelings were attraction.[1]

She goes on to talk about how her experience of writing Leah on the Offbeat, which was about a romance between two women, and how it made her rethink some of those childhood crushes. 

She also wrote about the fact that she feels like she was forced to come out and that she fears her coming out would be unfairly scrutinized. The fact is a lot of bi people don't realize they are bi until they are well past their teen years. We are told over and over again that bisexuality does not exist and then scolded for not realizing we were bi earlier. We're sorry that the circumstances were not ideal, but are happy to welcome Becky Albertalli to our bi family. 

As she said, 

Anyway, all of this is to say: I’m bi. Sorry it took me so long to get here. But then again, at least the little red coming out book I needed was already on my shelf (in about thirty different languages).[2]