Gemma Chan flashes her abs in an embellished gown with Eternals co-star Richard Madden at screening

They've known each other for a decade and played 'immortal soulmates' in the upcoming movie Eternals. And Gemma Chan and Richard Madden couldn't resist bringing their on-screen chemistry to the red carpet at the Marvel screening in Rome on Sunday. Co-stars: Gemma Chan and Richard Madden couldn't resist bringing their on-screen chemistry to the red carpet at the Marvel screening in Rome on Sunday The Crazy Rich Asians star looked a beauty in the sparkling co-ord, which featured diamantes along the high neckline, under the bust and at the waist. Sweet: Sparks were flying for the co-stars on the red carpet, who were spotted cosying up to one another Stunning: The Humans actress looked stunning as she donned a glamorous palette of makeup, complete with red lipstick and winged eyeliner Starlet: The actress, 38, looked incredible in a black embellished two-piece gown, flashing a peek of her taut abs in the slinky number Meanwhile, her on-screen partner Richard cut a handsome figure in a black silk suit at the movie event. Looking good: Meanwhile, her on-screen partner Richard cut a handsome figure in a black silk suit at the movie event Down-to-earth: The movie star beamed as he was pictured at the premiere, waving and smiling at his doting fans Richard's look: The Scottish native sported the early scruff of a growing beard on the red carpet He completed his look with black tuxedo pants for the Eternals screening.