And it's no wonder Cody is happy - he recently revealed he first fell for Miley, 26, when he was 12.
They became friends but he had to wait 10 years for things to get romantic as she was 'happy with another Australian.'
So in love: The Australian hunk , 22, who rocked a grey pea coat, white T-shirt and faded jeans, gushed to reporters at the event: 'I’m very happy. We are very, very happy'
That would be her ex-husband Liam Hemsworth. The couple split in early summer after six months of marriage and a 10-year, on-off relationship.
Miley had a brief fling with Kaitlyn Carter before her friendship with Cody became something more serious.
Cody explained: 'The reason why it hasn’t been a really crazy sudden thing is just because we’ve been friends for so long,' adding they 'found each other again in a space where we’re both not partying, working real hard, and it just keeps things healthy and it’s good.'
New beau: Miley posted this sweet camera selfie that a topless Cody shot of them in a bathroom, which he captioned, 'She made it home. Recovering from surgery send all vibes'
Now he is set to release a new song that he wrote for Miley while she was in hospital recovering from a nasty bout of tonsillitis.
'She’s pretty much forcing me to put it out,' he told People. 'She was like, ‘If you don’t put this s*** out, I’m putting it out on your behalf for you. I’m getting your Spotify login and doing this s*** myself.” '
Meanwhile, Cody shared part of the track on Instagram last week.
Strapped in: Miley Cyrus performed onstage during the iHeartRadio Music Festival at T-Mobile Arena on September 21 in Las Vegas