David Furnish calls husband Sir Elton the 'greatest gift' on singer's 70th

David Furnish has wished his husband Sir Elton John a happy 70th birthday, calling their relationship "the greatest gift of all".

The Rocket Man singer is celebrating his milestone birthday today and Furnish shared his heartfelt tribute on Instagram with a photo of them together.

He wrote: "Happy 70th Birthday Elton!! Husband. Partner. Soulmate. Friend.

"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"

Some of Sir Elton's showbusiness friends also offered their best wishes.

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."

Sir Elton will mark his 70th and his 50-year writing partnership with Bernie Taupin at a star-studded charity gala hosted by Rob Lowe in Los Angeles.

The event will raise funds for the Elton John Aids Foundation and Los Angeles-based art and culture centre the Hammer Museum.