The mother-of-one showed off her model credentials in a sexy figure-hugging dress at the Nuts 10th Anniversary Party at Aura on Thursday night (23 January).
Imogen teamed her eye-catching frock with black heels, a black clutch and a fiery red manicure. Our favourite bit of her look? The gorgeous, glossy and voluminous hair.
She has been hitting the gym hard since Christmas, telling fans on 2 January: "Get this body back and rid of the Christmas rolls." Among the classes she's been taking are body sculpt and Bikram yoga, although she's admitted she isn't against the occasional treat.
"When the bf brings a nandos home the healthy eating goes out the window #nom (sic)," she tweeted recently.
The Welsh model is gearing up for daughter Ariana Siena's first birthday next month. She gave birth to her first child with partner Adam Horsley on 11 February 2013.
Speaking to Reveal last year, she said motherhood was "the best feeling in the world" and she was loving every second of it, which is clear to anyone who follows Imogen on Twitter, as she frequently updates fans on little Ariana's progress and shares adorable pictures of the youngster.