Demi Lovato has a friendly reunion with ex-boyfriend Joe Jonas at the premiere of Camp Rock 3

Demi Lovato and Joe Jonas proved they were the friendliest of exes as they attended the premiere of Camp Rock 3 at The Walt Disney Studio Lot in Los Angeles on Monday. 

Demi and Joe dated in 2010 before splitting that same year after meeting on the set of Disney's Camp Rock back in 2007. 

The actor, 33, – who goes by they/them and she/her pronouns – cut a glamorous figure in a ruched satin brown dress as they posed for photographs with Joe, 36, and his brothers Kevin, 38, and Nick, 33. 

In their teenage years, Demi rose to fame portraying Mitchie Torres in Camp Rock and Camp Rock 2: The Final Jam.

The singer will reprise their role while Joe will play Shane Gray once again, the lead singer of the fictional pop-rock trio Connect 3.

A synopsis for the film reads: 'When pop-rock band Connect 3 loses their opening act for a major reunion tour, they return to Camp Rock to find the next big star.

'As the new generation of campers competes for the spot, intense rivalries spark unexpected romances, secret alliances, and major personal revelations.' 

Camp Rock 3 premieres on the Disney Channel on Thursday, and will begin streaming the next day on Disney+. 

This isn't the first time Demi and Joe have supported one another. 

Last August, the singer made a surprise cameo and performed songs from Camp Rock with The Jonas Brothers as the musical trio kicked off their 20th anniversary tour in New Jersey at MetLife Stadium. 

Fans said Demi had 'never looked and sounded better' while also noticing how 'happy and healthy' she appeared.

One fan said it was 'emotional' to see Demi look 'so happy, in tune with herself and just healing nicely', after overcoming addiction battles, a devastating break-up in 2021 and a nervous breakdown in 2011.

Demi captioned a reel of the pair together, 'For the history books,' tagging into the post her ex Joe, who went on to have two daughters with ex-wife Sophie Turner, 30.

The Cool for the Summer songstress since last May has been married to musician Jordan Lutes, 35. 

Demi previously spoke of her hopes to a do third Camp Rock film back in 2023. 

She said at the time: 'used to want to do an adult version of Camp Rock 3, like, an R-rated one'. 

'But I think too much time has passed and it's missed its chance.' 

However, two years later filming started for Camp Rock 3, with the show's leads all reprising their roles.