HEIDI and Spencer Pratt have renewed their wedding vows for their 10th anniversary as part of the upcoming Hills reboot.

The reality TV couple, who are often referred to as Speidi, looked in high spirits as they strengthened their union in front of their nearest and dearest.

Among the guests at the lush outdoor venue in Santa Barbara, California, were Audrina Partridge and Mischa Barton.

Heidi wore a sleeveless white dress with a large sheer skirt, while Spencer wore a suit and buttoned down shirt.

In pictures published by TMZ, he smiles as he plucks a flower from Heidi's bouquet of white and pink roses.

The couple became husband and wife back in April 2009, in Pasadena, California. With The Hills airing in 2019, the scenes will be shown closer to their actual anniversary.

The couple welcomed their son Gunner Stone on October 1 last year.

Back in October it was confirmed actress Mischa Barton was joining The Hills alongside the original cast.

The O.C stars presence has been praised by fans who are relishing her debut on the legendary reality show.

They wrote on social media at the time: "Mischa Barton joining the reboot of The Hills, I'm actually off. this day could not get better."

Another enthusiastically tweeted: "Literally gasped out loud reading about Mischa Barton joining The Hills. This is my O.C. dream."

While others noted the irony of the casting: "On The OC, Mischa Barton played Marissa Cooper, the character that inspired Kristin and LC, the stars of Laguna Beach and subsequently The Hills.

Somewhat ironically, The Hills was initially a spin-off of Laguna Beach which was centred around 'The Real Orange County' - as inspired by the Josh Schwartz series in which Mischa starred.

The Hills reboot was confirmed in September - eight years after the final episode.

A trailer for the new series played during the MTV VMAs after some of its original stars posed on the pink carpet of the star-studded bash.

The promo revealed aerial views of Los Angeles as an acoustic version of Natasha Bedingfield's Unwritten played over the top. Stephanie Pratt said: "It's like we're all growing up."

However, Lauren Conrad and Kristen Cavallari WON'T be taking part in the show, with a source telling People that Kristen has a rival reality show on E! and Lauren is "in a different place in her life, but she wants everyone to enjoy themselves. She wishes everyone the best.”

Stephanie Pratt, Audrina Patridge, Heidi and Spencer confirmed their involvement as they attended the MTV VMAs in New York.