The pair were among the many stars who arrived at Together for Short Lives Midsummer Ball 2015 on Wednesday evening (3 June).
Mum-of-one Rochelle looked stunning in a champagne-coloured satin gown with a plunging neckline and thigh-high split. Meanwhile, Capital FM DJ and former JLS singer Marvin looked dapper in a black suit.
Marvin and Rochelle also got up on stage at the event to announce that the ball had raised £385,000. What an amazing amount for a good cause!
The event was attended by Simon Cowell, Amanda Holden, Alesha Dixon, Katie Melua and Holly Valance.
Marvin tweeted: "Great to be a part of something that makes a difference! Thank you to all that attended and donated."
The charity ball marked Marvin and Rochelle's second red carpet event in a week, as they also attended the star-studded the Glamour Women of the Year Awards.
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