Una Healy shows off her svelte figure in yellow summer dress as she joins husband Ben Foden at charity gala

She's been busy in pop star mode over the past few weeks promoting The Saturdays' single Gentleman and filming their new video.

However, on Saturday, Una Healy was playing supportive wife as she joined Ben Foden at a charity ball in Northamptonshire.

The singer, 31, and England rugby star Ben, 28, were among the guests of a fundraiser for Niamh's Next Step - of which the sportsman is a patron.

Doing their bit: Ben Foden and Una Healy arrive at the Niamh's Next Step Charity Gala Ball in Whittlebury Hall, Northamptonshire on Saturday night

Doing their bit: Ben Foden and Una Healy arrive at the Niamh's Next Step Charity Gala Ball in Whittlebury Hall, Northamptonshire on Saturday night

The Charity Gala Ball at Whittlebury Hall was raising money for a charity in memory of local girl Niamh Curry, who was just five years old when she died of Neuroblastoma - an aggressive form cancer that mainly affects children - last year.

The charity was originally upset to fundraise Niamh's treatment, however the money now goes to fellow sufferers of the disease and helps raise awareness of it.

Following the 'lounge suits and summer frocks' dress code, Una showed off her svelte figure in a yellow and purple floral MILLY dress, which she teamed with a pair of leather high-heels.

Date night: The couple were enjoying an evening off parenting duties off their daughter Aoife

Date night: The couple were enjoying an evening off parenting duties off their daughter Aoife

Important: Ben is a patron of the Niamh's Next Step charity

Important: Ben is a patron of the Niamh's Next Step charity

Her husband Ben looked smart in a dark blue suit and light blue shirt as he posed at the bash with his stunning wife.

Inside the event, which featured an auction, Una had some fun in a photobooth with Niamh's mother Sam and their friend Becky Dickson.

She Instagrammed a photo of the three in wigs and hats, joking: 'Just joined a new girl band #niamhsnextstep @samcurry75 @bdickson6.'

Don't mess up your hair! It didn't look like Una had spent too long coiffing her hair as she pushed it out of her face

Don't mess up your hair! It didn't look like Una had spent too long coiffing her hair as she pushed it out of her face

Earlier on Saturday, Una tweeted: 'Heading to @NiamhsNextStep charity gala ball! #summerfrock.'

Also at Saturday's fundraiser was former Westlife singer Shane Filan and his wife Gillian.

The Irish pop star is embarking on a solo career with his debut solo single Everything To Me.

Smart: Ex-Westlife singer Shane Filan (2nd right) and his wife Gillian (far left) arrive with two friends

Smart: Ex-Westlife singer Shane Filan (2nd right) and his wife Gillian (far left) arrive with two friends

New girl band? Una larks around with Sam Curry and Becky Dickson in the photobooth

New girl band? Una larks around with Sam Curry and Becky Dickson in the photobooth