Zawe Ashton and Tom Hiddleston are expecting a baby

Tom Hiddleston and Zawe Ashton are expecting their first child together. The London-born screen star exuded red carpet elegance in a gorgeous diaphanous off-the shoulder gown as she unveiled the couple's happy news, which comes just weeks after the couple confirmed their engagement. Zawe Ashton debuted her large baby bump at the premiere of her new movie Mr. Malcolm's List Wednesday night in NYC; she's engaged to actor Tom Hiddleston The dress had silver filigree under the bust that rested on top of her growing bump to highlight her changing shape. Bumping along: Zawe's bump was more visible as she posed from the side for several snaps on the red carpet Details: The dress had silver filigree under the bust that rested on top of her growing stomach as well as on the drop shoulders Dazzling: The actress wore her stunning engagement ring along with pendant earrings. Later in the evening for the premiere's 'VIP reception,' Ashton his her burgeoning bump beneath a frilly off-the-shoulder mini dress with a flirty pink floral pattern Leggy: Showing off her toned legs, Zawe posed in a pair of off-white heels An insider told The Sun: 'Tom and Zawe have stayed quiet about their relationship but she has spent the last few weeks with him in the US.