Sienna Miller, 42, and her boyfriend Oli Green, 27, look giddy as they share a laugh in the Royal Box while leading the stars on day nine of Wimbledon

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Sienna Miller and her boyfriend Oli Green led the star arrivals on day nine of the Wimbledon Championships on Tuesday afternoon.

The British actress, 42, and her boyfriend Oli Green, 27, who is the father of her second born daughter, couldn't contain their laughter as they sat courtside.

Sienna and Oli put on a giddy display as they shared a laugh while sat in the Royal Box on Centre Court at the All England Lawn Tennis and Croquet Club.

They were among an A-list crowd watching No.1 seed Jannik Sinner take on world No.5 Daniil Medvedev in the men's quarter finals.

Later in the day, Jasmine Paolini faces Emma Navarro in the women's quarter finals for a chance to appear in Saturday's final.

The couple made a stylish arrival at the iconic west London venue, as they were pictured walking arm-in-arm underneath a branded umbrella.

Sienna, who makes an annual appearance at the Championships, looked typically chic in a neutral polka dot co-ord, which flashed her bare midriff.

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The mother of two, who welcomed her second child in January, teamed the stylish two piece with a pair of strappy heels and a white bag.

The Anatomy of a Scandal star wore her signature blonde locks in a cool up do and enhanced her pretty features with soft glam make-up.

Her actor boyfriend looked dapper in a sharp dark grey suit, which he teamed with a white shirt and a black tie. 

Bringing further glamour to the competition was Myleene Klass, 46, who cut an ethereal figure in a long white lace dress with statement shoulders.

She added a edgy vibe to her look with a pair of chunky black heels and sunglasses, while incorporating a pop of colour with a slick of red lipstick.

The TV and radio personality wore her brunette locks in loose waves and otherwise kept her accessories to a minimum.

Meanwhile, Olivia Attwood opted for a preppy look as she arrived wearing a navy pleated dress with black pumps and a jumper wrapped around her shoulders.

The TV presenter, 33, added a trendy Ralph Lauren cap to her summery outfit and toted a small grey Hermes Birkin in her hand.

She was joined by her footballer husband Bradley Dack, 30, who was debuting a platinum head of hair with a dark brown beard on the day out. 

Strictly star Nikita Kuzmin and Lauren Jaine were among the stars at the Rosewater Pavilion as guests of the Official Banking Partner of Wimbledon, Barclays.

It comes after Djokovic grabbed the microphone and aimed a roman candle straight at the Centre Court crowd during his match on Monday evening.

The seven-time champion turned his on-court interview into a rant about what he felt were boos directed at him during his straight-sets win.

It seemed the crowd were simply cheering 'Ruuuuuuune' for his opponent but Djokovic, as he often does, saw things differently.

'To all the fans that have had respect and stayed here tonight, I thank you from the bottom of my heart and I appreciate it,' he began. 'And to all those people that have chosen to disrespect the player - in this case me - have a goooooooood night.'

His rather non-plussed BBC interviewer Rishi Persad said: 'I am hoping they were just commenting on Rune, and they were not disrespecting you.'

Djokovic - who has a track record of taking on crowds - was having none of that. 'They were. They were [disrespecting me],' he insisted. 'I am not accepting it. No no no. I know they were cheering for Rune but that's an excuse to also boo.

'Listen, I have been on the tour for more than 20 years. I know all the tricks. I focus on the respectful people that pay for the ticket, and love tennis and appreciate the players. I played in much more hostile environments, trust me – you guys can't touch me.' 

The 37-year-old seemed to believe some in the crowd were masking boos in the pretence of supporting Rune. To my ears it seemed no different to Lord's saluting Joe Root after a century.

Rune himself said: 'I mean, if you don't know what was happening, probably it sounded like boo. But if we all know what happened, it was my name.'

The tennis felt almost incidental after all that, but for the record Djokovic won 6-3, 6-4, 6-2 and put in by a distance his best display of the Championships so far. Rune was poor, losing the first 12 points of the match and never really recovering.

In his press conference later, Djokovic stood by what he had said.

'When I feel a crowd is stepping over the line, I react,' he said. 'I don't regret my words or actions on the court.'

He also tweeted a photo after the game of him stretching for a ball across the court, with the caption: 'Sliding into quarters. Goooooooooooood night.'