It’s the pair's first public appearance as a couple after it was claimed they had begun dating earlier this year around March time, according to The Sun.
They posed for photos together as they arrived at the event held at the Regency Village Theatre in Los Angeles on Monday 2 August.
Watch: Taika Waititi breaks silence over Rita Ora and Tessa Thompson snaps
Ora, 30, wore a white blazer minidress with cut-outs along with matching white heels, while 45-year-old Waititi sported a grey suit with a casual unbuttoned white shirt.
Waititi appears in the movie sequel as Ratcatcher, starring alongside Margot Robbie’s Harley Quinn, Idris Elba as Bloodsport and Sylvester Stallone as Kingshark.
It’s been said the singer grew close to the director while she was filming for The Voice Australia and based in Sydney, where Waititi was shooting Thor: Love and Thunder.
The couple previously made headlines when they were both snapped kissing actor Tessa Thompson during a lunch in Sydney.
Waititi later addressed the buzz caused by the photos, stating he was “doing nothing wrong”.
Asked by the Sydney Morning Herald if the images upset him he replied: “Not really. I think in the world of the internet, everything goes away pretty quick.
"And also, 'is it that big a deal?' No, not really. I was doing nothing wrong. It's fine."
Waititi separated from New Zealand filmmaker Chelsea Winstanley in early 2021 after ten years of marriage. They share two children together.
Watch: Rita Ora wants to install a panic room in her London home