Leggy night out: Kate looks all dressed up as she arrives at the Royal Albert Hall to watch Gary Barlow perform

By Kirsty Mccormack

Last updated at 10:00 PM on 6th December 2011

She's known for her conservative style but tonight the Duchess of Cambridge dressed for the occasion.

The 29-year-old arrived at the Royal Albert Hall to watch Gary Barlow perform his second solo gig this week and opted for a shorter hemline.

Wearing a new season Zara printed dress and a black Ralph Lauren jacket, Kate looked rather leggy as she stepped out of her car.

Feeling chilly? The Duchess of Cambridge arrived at the Royal Albert Hall wearing a rather short dress

Looking stylish: Kate chose to wear a new season Zara printed dress with a black Ralph Lauren jacket

She teamed her dress with thick waist belt, a pair of black opaque tights and matching heels and carried a small clutch bag.

Kate wore her brunette hair in a loose curl and tried her best to keep it in place as she made her way into the venue.

Windy evening: Kate tried her best to keep her dark hair in place as she made her way up the red carpet

She stopped briefly to acknowledge the crowd with her husband - who was wearing a navy blue suit with a white shirt and coloured tie.

The newlyweds were no doubt excited about watching Barlow perform and looking forward to a good night out.

Just the two of us: The newlyweds looked a little bit unsure about what to do when they first got out of the car

Boys in blue: Kate was met by her husband and the Prince of Wales when she got out of her car

Night out together: Prince William and his wife looked in good spirits as they prepared to watch Gary Barlow perform

With the in-laws: Kate and William made their way along the red carpet with the Prince of Wales and the Duchess of Cornwall

Ready for the camera: Once inside the Royal Albert Hall Kate posed for more photographs

They made their way along the red carpet with the Duchess of Cornwall and the Prince of Wales who had also come to enjoy the concert.

Barlow is performing another gig at the London venue to raise funds for the Prince's Trust and the Foundation of Prince William and Prince Harry.

Nice to meet you: Gary Barlow spent time with the Royal couple before preparing himself for his solo performance

Height difference: Barlow looked fairly short as he posed with the Royal four

The Prince of Wales wore a similar suit to that of his sons but opted for a matching tie instead, and his wife also dressed up wearing a bronze-coloured pleated skirt with an embroidered velvet jacket and black heels.

The Royals met with Barlow ahead of his performance and then made their way to the Royal box to enjoy the concert.

The singer is on good terms with the Royal family after he was asked to organise an event for the Queen's Diamond Jubilee celebrations next year.

Ready for the show: The foursome made their way to the Royal box to watch the gig

The gig will also be a nerve-racking performance for X Factor finalist, Marcus Collins, who has been invited by his mentor to join him on stage.

Earlier today Barlow tweeted a photo of the Liverpudlian rehearsing, saying: '@MarcuscollinsUK sound checking for tonight's performance.'

Different looks: The 29-year-old look rather different tonight (L) compared to how she usually dresses

The post came a few hours after Barlow tweeted: 'For anyone coming to the Albert Hall tonight we have an extra special guest just confirmed.'

Perhaps he was referring to Collins or maybe he's got some other tricks up his sleeve.

Last night the father-of-three was joined by Jason Donovan, Lulu and former X Factor contestant Olly Murs as he entertained the crowd.

Going solo: Gary Barlow performed his first of two gigs at the Royal Albert Hall last night to raise funds for the Prince's Trust

Special guest: Barlow was joined by Olly Murs who sang Shine with him

Speaking to the Evening Standard after his performance, Barlow said: 'I loved it. It's exactly the sort of night that's whetted my appetite for solo work.

'Not to make solo records again... but to do gigs for special occasions like this one for the Prince's Trust.'

The gigs are raising funds so that the Trust can invest £2.5million in helping five areas that were hit the hardest during the August riots in London, Manchester and Birmingham.

Ready for round two: Tonight the Take That singer will be joined by his X Factor hopeful Marcus Collins

Kate is a patron for the Foundation of Prince William and Prince Harry, so is course very involved in the work that it does and no doubt she's looking forward to tonight.

At the Princess Diana Memorial concert at Wembley back in 2007, she was spotted singing along to Take That's hit, Back For Good, as the band performed it.

The song obviously had personal meaning for her as it was just after her and William had reunited following a break from their relationship.