Her rep told People magazine the couple got engaged on August 8, just a mere six months after first hooking up to co-write a song for Avril's upcoming album.
"A romantic relationship blossomed as they spent time writing together," a friend of Avril’s told the mag.
"He makes her so happy," added a family insider. "Both of their families could not be more excited."
For Canadian rock music fans this must be a match made in heaven.
Avril was previously hitched to Sum 41 frontman Deryck Whibley, with the two calling it quits in 2009 after three years of marriage.
She dated reality TV personality Brody Jenner from 2010 to 2012.
This will be Chad's first marriage.
Congratulations Avril and Chad — let's hope this one lasts.