Last month, Katie revealed that she and her partner were expecting their first baby together, adding: "I just want to shout it from the rooftops!"
Katie, 30, teamed her loose-fitting white top with a stylish pair of black trousers for the prestigious event last night (7 October) and added a pop of colour with bright red heels.
She coordinated her shoes with a red manicure and a pillar-box pout and swept her long blonde hair into a glamorous up 'do.
The Pride Of Britain Awards, held at Grosvenor House Hotel on London's Park Lane, are close to Katie's heart.
In 2008, she suffered life-changing injuries in a chemical burn attack and has since shown nothing but determination and courage - much like the winners and nominees last night.
Taking to Twitter before the event, Katie told followers: "Looking forward to @PrideofBritain awards tonight. Will pack the tissues now!"
Meanwhile, Katie was not the only pregnant star on the red carpet. Peter Andre's girlfriend Emily MacDonagh also showed off her bump in a long metallic gown.
See more glamorous red carpet outfits from the Pride Of Britain Awards 2013 in our gallery:
Copyright: WENN Zibi