She was bombarded with congratulatory messages as she shared a comical stick figure drawing of her and her other half on social media, alongside the simple caption: "ENGAGED!" The couple was rumored to have gotten back together later that year before splitting again.
The Hurt So Good singer also claimed that Meg was turned off by 'childlike ways'.
The pair dated for three years but called it quits in 2014.
"Oh, women hate me".
Michelle Obama says she can 'never forgive' Donald Trump
Obama also reiterates that politics isn't for her, alluding to her previous dismissal of a potential 2020 presidential run . She writes about Mr Trump following Mrs Clinton around the stage, standing nearby and "trying to diminish her presence".
He continued, "I think it's because I'm a child".
Talk of an engagement began after Ryan was spotted wearing a new sparkler on her ring finger on Wednesday in NYC (inset above). I throw fits, I gripe, I complain. "She was just an angel sent to me at the right time", Mellencamp told radio personality Howard Stern at the time. "I'm moody. Every bad thing that a fella can be, that's me".
Congratulations are in order for Meg Ryan and John Mellencamp! "She hates me to death". John has been married three times and is father to five children, including the Real Housewives of Beverly Hills star Teddi Mellencamp.
In 2006, Meg adopted her daughter Daisy, now age 14, from China.