The actress, looked nothing short of sensational in the eye catching boucle, figure-hugging number, as she posed for photos outside the Ed Sullivan Theater.
Her long sleeved garment boasted a glamorous glittering gold edged V-neckline and several coordinated small pockets.
She elevated her frame in a pair of towering gold heels by Christian Louboutin and accessorised with a large pair of earrings.
Styling her short blonde tresses in curls, Hannah seemed in good spirits as she posed for photos and talked to waiting fans outside the venue.
Hannah was later pictured on stage talking to a large audience at the SAG-AFTRA Foundation Robin Williams Center.
She seemed in good spirits as she donned the same outfit while sat on stage speaking to the crowd.
The SAG-AFTRA Foundation, formerly the Screen Actors Guild Foundation, is an American organisation that provides assistance and educational programming to the professionals of SAG-AFTRA.
Last week the London-born performer was overcome with emotion as she at The Grosvenor House Hotel in London.
Hannah won for the 2023 Song Contest, which she co-hosted with , and Julia Sanina.
Accepting her award, the actress shared: ‘I feel like I’m going to look back at photos like, “Can you stop grinning like a Cheshire cat?” I’m very pleased. It’s a little overwhelming.
‘As a live TV novice, BBC Studios grabbed me in, and, I don’t mean to be cheesy, they absolutely made me believe I could do this.
‘When we finally went up, I can’t tell you how supported we felt. I would not be here if BBC Studios hadn’t reached out to me.’
Despite all her recent success, it was only four years ago that Hannah got her big break when she bagged the role of Richmond FC owner Rebecca Welton in the hit Apple TV+ series – which has earned her two for Best Supporting Actress.
She has since stunned audience and critics alike with her quick wit, old-school glamour and incredible singing voice.
Elsewhere at the RTS Awards, the top TV winners on the night went went to BBC dramas Time and Happy Valley, with star Sarah Lancashire taking to the stage to accept the award, despite skipping the pre-ceremony blue carpet.
Three-part series Time starred Jodie Whittaker, Tamara Lawrance and Bella Ramsey, as three inmates who all arrive at a Liverpool prison on the same day.
Tamara, 30, took home the Leading Actor – Female award for her role in the prison drama with the jury praising her ‘deep, layered performance’.
Bella, 20, was also recognised, winning the Supporting Actor – Female award over fellow nominees Jasmine Jobson for Top Boy and Ronkẹ Adékoluẹjo.
Happy Valley, which stars Sarah as Sgt Catherine Cawood and James Norton as murderer Tommy Lee Royce, beat out The Gold and Top Boy for the Drama award.
