Rumors swirled that the couple was making it official after Ryan was spotted out on Halloween wearing a sparkling ring on a certain finger.
Mellencamp, 67, who has also recorded under the names John Cougar and John Cougar Mellencamp, is best known for his 1982 hit Jack and Diane.
The pair dated for three years but called it quits in 2014. The couple was rumored to have gotten back together later that year before splitting again.
Congrats to the happy couple on the news! He and his third wife, model Elaine Irwin, split in 2010 after 18 years of marriage. "I said, 'I can't kiss you, can I?' And he said, 'No, don't!'"
In a 2008 interview with InStyle, the petite actress revealed that after news of her relationship with Crowe broke, Hollywood treated her like "the scarlet woman". She hates me to death.
This isn't the first time walking down the aisle for either Ryan or Mellencamp.
'I throw fits, I gripe, I complain.
In 2006, Meg adopted her daughter Daisy, now age 14, from China. Mellencamp has five children from three past marriages.
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