December 11, 2014 - 11:14 GMT hellomagazine.com Rebecca Adlington showed off her small baby bump at The Sun Military Awards, where she partied with Simon Cowell, Daivd Beckham, Rod Stewart and Penny Lancaster Rebecca Adlington displayed a hint of a baby bump at the The Sun Military Awards on Wednesday night. The glowing mum-to-be beamed as she walked the red carpet in a royal blue Zeynep Kartal dress that showed off her blossoming tummy. Becky, who announced her first pregnancy in HELLO! Magazine in December, attended the event with her TV presenter friend Tonia Buxton, instead her husband of three months Harry Needs. Becky Adlington wowed in a bold floor-length gown The 25-year-old former Olympic swimmer documented her night at the star-studded awards ceremony on Instagram."Amazing night at The Sun Military Awards," she posted alongside a photo of herself with uniform-clad military personnel. "Incredible honour to be in the same room. What they all do is just unbelievable #military #heroes." Becky, who said that she "couldn't have been more star stuck", uploaded several photos of her fellow famous partygoers. Amazing night at The Sun Military Awards. Incredible honor to be in the same room. What they all do is just unbelievable #military #heroes A photo posted by Rebecca Adlington (@beckadlington) on Dec 12, 2014 at 3:40pm PST "I was like a little kid in a sweet shop!" Becky wrote next to a picture of herself with football legend David Beckham, while another photo with Rod Stewart and his wife Penny Lancaster was captioned: "What a moment!!!" Becky and her friend Toni also took the chance to take a photo with X Factor judge and music mogul Simon Cowell. "Thank you @toniabuxton for being an amazing date last night!" wrote Becky. "What a lovely man @SimonCowell was!!" Couldn't of been more star stuck!!! I was like a little kid in a sweet shop! A photo posted by Rebecca Adlington (@beckadlington) on Dec 12, 2014 at 3:42pm PST Becky and her husband Harry are set to become parents in June 2015. "The due date is 4 June so, yes, we must have conceived on the first day of our honeymoon in Venice," Nottingham-born Becky told HELLO! "But we're not the Beckhams," added Harry. "We won't be calling the baby Venice!"