The 26-year-old actor and his 23-year-old girlfriend Miley Cyrus are “so happy,” according to her dad Billy Ray.

“Miley and I, we always had this slogan— ‘If you ain’t happy, it ain’t working.’ Just seeing these— I still call ‘em kids— these two kids happy, that’s all that matters,” Billy Ray told E! News.

“If any of my kids decide that they’re gonna have a wedding of any kind, whatever role they want me to play, I’ll be there, you know what I mean?” Billy Ray continued. “They want me to be the butler—that’s fine. Whatever they choose. I might make a good preacher.”