The brunette beauty opted for a cute little white dress as she sauntered up the red carpet alongside a host of fellow celebs.
Imogen's adorable frock featured scalloped detailing and semi-sheer panels, plus a flirty thigh-grazing hemline.
She accessorised with a white watch and a few gold rings, completing her ensemble with towering raspberry red ankle boots.
Her brunette locks were styled in glossy waves and she kept things simple on her talons, rocking a low-key ballet pink mani.
The starlet decorated her chocolate peepers with heaps of black eyeliner and lashings of mascara, finishing with bold brows and a slick of lipgloss. Gorgeous!
Other attendees at the event included Celebrity Big Brother star Casey Batchelor, who sported sunny yellow trousers, plus Alesha Dixon and Girls Aloud singer Sarah Harding.
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