January 30, 2016 09:40 PM

Viola Davis took home her fourth Screen Actors Guild award Saturday.

The award for outstanding performance by a female actor in a drama series, presented by Taye Diggs and Eva Longoria, was awarded to Davis for her role in How to Get Away with Murder.

In her acceptance speech, Davis – who plays a law professor at a prestigious university who gets entangled in a murder plot with her students – said, “There’s this saying: ‘I am not who you think I am. You are who you think I am.’ ”

Davis, 50, said of her approach toward taking on the role of “anti-hero” Annalise Keating: “I always think, Why do I have to be a hero? Why do you have to like me? And why do I have to be a mentor? My job as an actor is just to create a human being flawed, messy, maybe not always likable, maybe not always cute.”

Check out PEOPLE’s full 2016 SAG Awards coverage and complete winners list!

Davis also noted at the podium that her experience on HTGAWM “has been the joy, pleasure of my life.”

Davis was up against Homeland star Claire Danes, Dame Maggie Smith of Downton Abbey, Julianna Margulies from The Good Wife and Robin Wright from House of Cards.

The 22nd annual Screen Actors Guild Awards are airing live on TNT and TBS.

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