"It's official- we're engaged! #couldn'tbehappier," Modano posted, along with a picture of the couple.
Modano did not say who the lucky lady in the picture was, but several websites report that he has recently been linked to professional golfer Allison Micheletti.
Micheletti is the daughter of former NHL player and current New York Rangers broadcaster Joe Micheletti.
Modano retired in 2011 after playing 21 seasons in the NHL with the Minnesota North Stars/Dallas Stars and Detroit Red Wings as the all-time American-born goal scoring and points leader in league history.
He was previously married to singer Willa Ford, but the two divorced in 2012 after five years of marriage.