Sir Elton John celebrates milestone 70th birthday with star-studded LA bash

Elton John and Bernie Taupin arrive at Rocket Man star's 70th birthday: Jordan Strauss/Invision/AP

Sir Elton John celebrated his milestone 70th birthday with a star-studded party in Los Angeles.

The Rocket Man singer marked the big day on Saturday night with a joint bash to celebrate his 50-year writing partnership with Bernie Taupin.

The likes of Katy Perry and reality TV stars Sharon and Kelly Osbourne made an appearance alongside the singer-songwriter’s husband David Furnish.

Hosted by actor Rob Low, the event raised funds for Elton John Aids Foundation and Angeles-based art and culture centre the Hammer Museum.

Singer Katy Perry arrives at Elton John's 70th in Los Angeles on Saturday (Jordan Strauss/Invision/AP)

Singer Lady Gaga provided the entertainment as she took to the stage for a special performance.

Sir Elton celebrated his birthday with his children too, and he shared a photograph of himself with his sons Zachary and Elijah preparing to blow out the candles on his cake.

Along with the picture, Sir Elton wrote: "Birthday bliss."

In a separate social media message, the singer showed off a birthday card and wrote: "A huge thank-you to all my Facebook friends for the fabulous birthday card signed by all of you!"

Sharon and Kelly Osbourne arrive at the Rocket Man star's birthday bash that raised funds for Elton John Aids Foundation (Jordan Strauss/Invision/AP)

Earlier on his birthday, Sir Elton's husband Furnish shared a heartfelt tribute online to his "partner, soulmate, friend".

He added: "Sharing my life with you is the greatest gift of all.

"Thank-you for all the love, humanity, joy and happiness you bring to our world. I love you forever. @eltonjohn £HappyBirthdayElton."

Other tributes poured in from Sir Elton's famous fans, including Britain's Got Talent star David Walliams, who wrote on Twitter: "Happy 70th birthday to a genius musician who has made the world a better place with his charity work @eltonofficial."

Barry Manilow posted a throwback photo of himself and Sir Elton in their younger days where the birthday boy was wearing a large headdress, with the caption: "Happy Birthday to @eltonjohn £HappyBirthdayElton".

Chat show host Ellen DeGeneres tweeted: "Happy birthday, @Eltonofficial! I love a Saturday bday. Saturday night's the night I like. Saturday night's alright alright alright."

Hollywood star Ben Stiller wrote: "Happy Birthday @eltonofficial. Can't imagine a world without your music. £respect."