A spokeswoman for Lavigne confirmed a Tuesday report from People magazine that the 27-year-old pop singer and 37-year-old rocker became engaged earlier this month after dating for six months.
The magazine says Lavigne was introduced to Kroeger in February when they met to co-write a song for Lavigne's upcoming album.
It will be the first marriage for Kroeger and the second for Lavigne. She filed for divorce in 2009 from Sum 41 frontman Deryck Whibley after three years of marriage.
Lavigne surged to fame with her 2002 album "Let's Go." Kroeger has served as lead vocalist and guitarist for Nickelback since the band formed in 1995.