The actress sported a visible baby bump at a press conference for her new film, Southside With You, in Los Angeles on Friday (12Aug16), and later confirmed the happy news on social media.

"Preggers and promoting w Legend. Happy and proud. #Southsidewithyou #Aug26th @johnlegend," the 36-year-old captioned her selfie on Instagram and Twitter with the film’s executive producer, musician John Legend.

She later posted a shot of herself in a figure-hugging dress, proudly showing off her baby bump, with the caption, "Grateful. Happy. Complete."

Sumpter, who stars in U.S. TV shows The Haves and Have Nots, is expecting a daughter later this year, and a source told that she is "super happy." The father of her unborn baby has yet to be announced.

The actress plays a young Michelle Obama in the movie Southside With You. The romantic drama focuses on Michelle’s first date with Barack Obama back in 1989, and their budding relationship before their years in the White House.

Richard Tanne directed the film, with a script co-written by himself and Sumpter, with Zero Dark Thirty star Parker Sawyers playing the future President of the United States.

Southside With You is released in the U.S. on 26 August (16).