The couple appeared to be in love as they watched as they watched Serena Williams beat Danka Kovinic in a first-round victory in tennis, ahead of her retirement.
Agruma arrived wearing a strikingly different ensemble, including a black knee-length dress by Alessandra Rich with a lace collar, strappy black-and-white sandals, and a Chanel clutch.
Wilson could be seen at one point, smiling broadly and sweetly resting her cheek on Agruma's shoulder.
In June, Wilson came out as a member of the LGBTQIA+ community and revealed that she was dating Agruma.
"I believed I was looking for a Disney Prince... Wilson captioned a photo of herself and her then-boyfriend with the hashtag "#loveislove" on Instagram. "But maybe what I really needed all this time was a Disney Princess," she wrote.
Wilson acknowledged that coming out was "very hard," and she only made their relationship known because an Australian newspaper planned to run an exclusive on her and Agruma's relationship.
At the US Open in New York, Australian actress Rebel Wilson and her girlfriend Ramona Agruma shared a tender kiss while supporting the tennis players.