Kyle Sandilands and Tegan Kynaston arrive for his birthday cruise

Kyle Sandilands has gone all out for to celebrate his 50th birthday with a cruise of Sydney Harbour on board a luxurious superyacht on Saturday.

The radio shock jock made quite the entrance with his glamorous girlfriend Tegan Kynaston, 35, arriving fashionably late for his party on the $3000-per-hour vessel.

With the yacht already out on the harbour, Kyle and Tegan were seen on the dock waiting for a boat to take them out to sea.

The couple looked as loved up as ever, holding hands and smiling as they waited for a boat.

Tegan showed off her trim and toned figure in a gold sequin mini dress that drew attention to her long legs.

She teamed her look with Louis Vuitton sunglasses, black Versace heels and a pink Balmain clutch.

The blonde beauty styled her shoulder length sandy locks in voluminous curls and opted for a minimal make-up look with a radiant base and nude lips. 

Kyle looked suave for the occasion in a grey blazer jacket with a black button up, matching trousers and leather Dolce and Gabbana sneakers.

He completed his sharp ensemble with a pair of designer aviator sunglasses.

At one point Tegan turned her back to answer a call and Kyle was spotted speaking to a young fan who likely approached him to greet him a Happy Birthday. 

The couple’s private speed boat had arrived and was ready to take them to the party aboard the boat.

Kyle helped the blonde beauty on board as she took a large stride to get on. 

The glamorous duo took their seats on the speed boat as it whisked them to the superyacht.

Among the many guests who boarded the yacht earlier was his longtime co-host Jackie ‘O’ Henderson.

The 46-year-old stunned in a black and gold sequin blazer dress that skimmed her thighs, and black heels.

She was seen clutching on to the arms of one of Kyle’s security personnel helping guests onto the boat.

Also spotted making his way party was Guy Sebastian who looked dapper in a paisley blazer, a black turtleneck and gold and black trousers. 

He carried a black gift bag with a card that read: ‘To Kyle (heart) Guy’ as he followed Kyle’s security personnel down the wharf.

Retired professional boxer Jeff Fenech, his wife Suzee and their daughter Kayla coordinated their ensemble by wearing white. 

Jeff wore a white jumper with jeans and gold chains, while Suzee and Kayla each wearing unique figure hugging frocks.

Kyle’s friend and manager Bruno Bouchet and his wife Laura also attended the party.

He kept rugged up in a coat with a yellow and black scarf, while his stunning wife Laura wore a glamourous faux fur coat with a white cleavage-bearing top and high waisted trousers.

Kyle’s brother Chris was also seen arriving at the wharf, ready for a night fun on the harbour. 

Kyle and Jackie O producer Peter Deppler, also known as Intern Pete, was busy on the red carpet interviewing guests arriving. 

He spoke to former NRL star and guest presenter Beau Ryan who attended the party with his wife Kara.

Guests boarding onto the vessel were welcomed by a violinist and cocktails, while  elsewhere a saxophonist played. 

As the superyacht set sail, some of the guests could be spotted including Sunrise executive producer Michael Pell.

He was busy chatting with Kyle and Jackie O show newsreader Brooklyn Ross, and alongside them was Michael’s partner Daniel Burgess-Wise.

Elsewhere was Kyle and Jackie O show producer Pedro Cuccovillo Vitola who enjoyed a cocktail alongside his wife Patty.

Next to them was media personality Darryn Lyons, with his trademark pink hair, who held up his champagne flute. 

Samantha Jade was seen at the stern of the ship performing for the guests on board.

Elsewhere, Jackie was seen enjoying the festivities with a glass of wine as she enjoyed the sunset view of Sydney and the performance along with the other guests.

After Kyle and Tegan’s glamorous arrival, the radio shock jock was seen greeting guests and mingling.

He beamed for a photo with a beautiful blonde friend who was clearly enjoying the festivities.

Kyle’s yacht sailed all over Sydney Harbour and treated his guests to a beautiful winter sunset.

The vessel was decorated with an abundance of gold and black balloons, and was branded with ‘King Kyle 50’ on both sides of the ship.

He was also presented with a lavish three-tiered ‘King Kyle’ with a crown at the very top.

Behind the cake was also an eye-catching gold balloon display and light numbers displaying the big ’50.’

According to  on Saturday, the shock jock gave guests a fun dress code for the evening and had plans to party both day and night. 

And they’re off! Kyle and Tegan were later seen departing the boat by nightfall, heading to Kyle’s Sydney mansion to party all night with their guests 

Comfortable! Jackie had on a pair of white slippers as she walked on the wharf after the do 

All smiles! Samantha and Guy were still bright-eyed, smiling for photos as they departed 

Kyle and Tegan were later seen departing the boat by nightfall, followed by Jackie had on a pair of white slippers as she walked on the wharf after the do. 

The radio king was carrying a gold gift bag as he held hands with his girlfriend, the pair heading to Kyle’s Sydney mansion to party all night with their guests. 

Samantha and Guy were still bright-eyed, smiling for photos as they departed, while Beau and his wife Kara also headed off into the night. 

Hide me! A female guest took shelter behind singer Guy 

Heading home: Beau and his wife Kara headed off into the night 

Festive! The party guests looked very festive indeed 

Festivities reportedly started around lunch time and will run into the night.

The publication reported that Kyle asked guests to ‘add a touch of gold’ to their outfits.

The publication noted the party will be a wild ‘day-night’ event.

Let the celebrations begin! Kyle was presented with a lavish three-tiered ‘King Kyle’ cake and an elaborate balloon display at his birthday bash