The star is the only Black series regular, and earlier this week hit out at the negative portrayal of Black people in the media.
In response, Riverdale showrunner Roberto Aguirre Sacasa has apologised and said the show must “do better” in a Twitter statement that has since been retweeted by Morgan.
“We hear Vanessa,” he said. “We love Vanessa. She’s right. We’re sorry and we make the same promise to you that we did to her. We will do better to honour her and the character she plays. As well as all of our actors and characters of colour.
“Change is happening and will continue to happen. Riverdale will get bigger, not smaller. Riverdale will be part of the movement, not outside it.
“All of the Riverdale writers made a donation to [Black Lives Matter LA], but we know where the work must happen for us. In the writers’ room.”
Paul Archuleta / Getty Images
It comes in the wake of widespread global protests in support of Black Lives Matter following the death of George Floyd.
Morgan’s co-star Cole Sprouse revealed earlier this week that he was arrested while taking part in a protest.
Riverdale season 4 airs on Wednesdays at 9/8c on The CW in the US. In the UK, you can stream via Netflix every Thursday.
For more information on how you can support Black Lives Matter, please visit its official website or donate here. Readers can also donate to the UK anti-discrimination group Stand Up To Racism, and the Unite Families & Friends Campaign, which supports those affected by deaths in police, prison and psychiatric custody.
Digital Spy now has a newsletter – sign up to get it sent straight to your inbox.
Looking for more TV recommendations and discussion? Head over to our Facebook Group to see new picks every day, and chat with other readers about what they’re watching right now.
This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io