Sometimes all it takes is a tweet. One of the many big announcements to come out of Marvel Studios' San Diego Comic-Con panel was the casting of Simu Liu in the lead for Shang-Chi and the Legend of the 10 Rings. But it seems that Liu's starring role didn't come out of nowhere--it might have started with a tweet that the Kim's Convenience actor sent to Marvel last year.

Although the Shang-Chi movie was officially announced at the SDCC panel, it was first reported that Marvel was planning a movie based on the Asian superhero in December 2018. Liu clearly knew that he was right for the role, so fired off this tweet shortly after the news broke:

OK @Marvel, are we gonna talk or what #ShangChi
— Simu Liu (@SimuLiu) December 3, 2018

Nearly seven months later, it was confirmed that Liu was indeed playing Shang-Chi. The actor was quick to remind fans where it all started, with this reply to his original tweet:

Well shit.
— Simu Liu (@SimuLiu) July 21, 2019

Of course, we don't know the background to the first tweet and the conversations that happened in the time between. But it's exciting to think that a tweet to Marvel is all it takes if you're the right choice for the role.

Shang-Chi will also star Awkwafina (Crazy Rich Asians) and be directed by Destin Daniel Cretton, who also helmed Brie Larson's breakthrough film Short Term 12. It hits theaters on February 12, 2021.

At the SDCC panel, Marvel boss Kevin Feige also announced Black Widow and The Eternals in 2020, followed by Doctor Strange 2: In The Multiverse of Madness and Thor: Love and Thunder in 2021. The new Thor film will see Natalie Portman reprising her role as Jane Foster, who in this movie will become the Goddess of Thunder. There was also a big surprise at the very end of the panel when Academy Award winner Mahershala Ali was announced as the title character in a new Blade movie.

For a full recap of the panel, check out our rundown on everything announced at the Marvel Studios panel.